Studio strobes (Elinchroms) - what are your must-have modifiers?

After learning lighting with Speedlights for the past year, I was thrilled to get a set of studio strobes for Christmas: The Elinchrom D-Lite it 2, 2-light To Go kit. They're just about the very bottom end of the Elinchrom lights, but they're certainly a step up from my YN560s, especially now that I have modeling lamps.

The kit came with two 26" Portalite softboxes, and this reflector, whose description says it's for an umbrella even though the kit didn't come with an umbrella. dunno.

My usual subjects are people - standard modeling (business headshots, some glam modeling) and "specialty" modeling (cosplay/costumes, performers, dramatic lighting); product photography; and getting into some architecture/interior photography (I'll probably just keep using the Speedlights for this, for ease of portability).

Are Elinchrom modifiers and accessories pretty universal for all Elinchrom lights? Any third-party that's effective but maybe less expensive?

What are some must-have modifiers or accessories? What are your favorites? Some things that I might want to want to put on my wish list:
- Beauty dish
- Snoots and grids, especially for a hard/focused spotlight effect
- Strip box for rim/edge lighting
- A boom to go on a stand, so I can put a light overhead without the stand being in the shot?

Here's a few of the popular ones:

Maxi lite
39"/27" deep octa
53" octa
Speedotron/kacey beauty dish

Many will have different opinions, but for me...

el deep octa 100cm
el 21cm reflector + grid kit + barn door kit

39" DO
Maxilite

Are the rockers

39" Deep Octa
Mola Demi BD + grid

for sure the 53" octa!

Any more details on some of these recommendations? WHY you love the modifiers that you do? Size, ease of setup and transport, or "there's just something about it?"

In terms of size and shape, the Octa seems very similar to the cheapo reflective brolly boxes that I've been using with my Speedlights .. which I'm very used to using, and love.

the 53 is a good size for a small to large studio. Small studio, you could use a reflector for fill, and larger you can use additional lights to work magic The Eli octas set up and tear down quick- 30 seconds. I have not used the deep octa yet, so I can't comment on it, but I love the wrap on the 53"

Maxilite high output at low power
Low cost
Great in wind on location work
I can do just about anything with it. Spot to Wide
Its not the best for travel do to size, but I use it on 98% of all my work.

Fireball

100cm deep octa (sorry i'm metric) gives a fantastic soft light and is very easy to use. I have the 2m indirect octa, and whilst the light is incredibly soft the thing is huge.

21cm reflector and grid/barn door kits. a highly versatile modifier for back, rim and controlled lighting. I did consider a beauty dish instead of the 21cm kit, but considered the 21cm kit more useful

the best advice is to decide what lighting you're trying to achieve then establish what is required for that result

- 27" and 39" DO's, but grids for them will cost you an arm and a leg
- 22" beauty dish (I like the Kacey)
- 27" beauty dish (I prefer the Mola Setti to the Fireball, but Scott's results speak for themselves!)
- 53" octa also makes a great fill light
- 7" reflectors and grid set for accent/hair lighting
- Gridded strip boxes (I have a bunch but prefer the 9"x36" Chimera for accent/hair/edge lighting)

The giant (74") indirect octa is awesome, but it's huge and more specialized. And I also still like the Photoflex medium (60") gridded octa as long as I don't have to take it apart and put it back together. The 60" Softlighter II's are pretty handy as far as portability, soft light, and versatility, like for large group shots. A boom provides options you wouldn't have without one, but it's not specific to Elinchrom modifiers. You might also consider reflector sets. Sometimes one light and a reflector is all you really need.

All these softboxes are really expensive xD i thought that its just something with metal poles and soft fabric...turns out there more expensive than the actual unit....
Whats the difference between them?
am planing on buying paulCbuffs softboxes and umbrellas, right track?
http://www.paulcbuff.c​om/softboxes.php

Some form of umbrella or umbrella-like product is generally considered a kit essential and a great less expensive way to start out especially if your budget is not greater than the value of your strobe pkg.