GND most used/useful filters

I'm thinking about taking the plunge and getting a filter holder and some GND filters. I've read about the Cokins and cheaper filters not being "neutral", so have decided on getting this Lee foundation kit and filters. Some questions:

* I'll be shooting with a 17-40L on a 5DII. There's 2 77mm filter adapters, but I assume the wide-angle adapter would be the one to get? No vignetting?

* For the filters, I see there's resin and polyester. Recommendations and reasons for one over the other? Are there other, better options?

* I've read this recommendation somewhere here in the past, but can't for the life of me find it now when I need to. What do you recommend as a base combination of filters. Eg a 3 stop hard, 2 stop soft, 3 stop soft? ie what's the most useful base combination of filters. Keep it to, say, 2 or 3 unless that's impractical.

Should point out that I already have a screw in Hoya Super Pro 1 CPL and a B&W 6 stop ND screw in filter too.

* Thinking about a 3 stop ND filter, not sure if I should get another screw in one or on for the holder. B&W brand is ok? Recommendations?

Get the wide angle adapter. I use the Lee system on my 5D with 17-40 and it doesn't vignette.

Thanks mate. What about recommendations about what filters to get?

Here are a couple of pictures I took using GND filters 4 days ago. Click on link then click on picture after the link opens to get a larger size.
http://www.flickr.com …/37014341@N03/4​743187397/
http://www.flickr.com …/37014341@N03/4​743817902/

I use a GND filters a lot for some of my shots. I bought the Cokin Graduated Neutral Density Filter Kit for "P" Series to see how it works and if I like to use them or not without spending a small fortune on the Singh-Ray version.
http://www.bhphotovide​o.com/c/produc...ty_Fi​lter.html

Take Care,
Cheers, Patrick

THough the Cokin ones have a slight magenta ting, it is so easily removed if you shoot raw that it's almost worth the savings in cost.

Thanks again for the thoughts.

Still, regardless of brands, what types of filters do you recommend to start out with? In terms of hard vs soft, and how many stops?

And what about the material the filters are made from? Resin vs polyester vs whatever-else?

you can't go wrong with getting a 2 stop soft grad nd or a 3 stop hard grad nd.

I would get the 3 stop hard, you can always feather the glass into a soft by hand holding it, and have a longer shutter speed to compensate for the 3 stop (if it's too much).

I just bought a Cokin Z-Pro holder and Hitech 4" filters. To start, I bought 3-stop filters (ND & GND). I'll add 2-stop filters of each soon.

I also bought a Hoya Pro1 CPL. I figure that will give me up to 5 stops for motion blurred water. Seven when I get my next set of Hitechs.

Oh yeah, the Hitechs are resin and I'm sticking with soft GNDs. About the only time you're going to need a hard is for seascapes but soft can be used there too.

I'd get hard edge GNDs...they are easier to feather and to dodge in Photoshop.

Most start with a 2-stop and a 3-hard. These will normally cover you for most situations. I've been using my hard gradients more often than not...makes it much easier to dodge areas that I don't want to appear too dark relative to the rest of the image. Each type has its place.

I used Hitech filters for years without any issues or complaints, although some are now claiming a slight colorcast (maybe their quality control has changed over the years?). I'm now using Lee GND filters.

Thanks so much guys. Will get 2 and 3 stop hards if my wife is around while I'm making the order. If she's not around, I might add in the 2 stop soft as well

Just made a massive order at Adorama, including the Lee filter holders and filters. Some are backordered but that's ok, I'm not in a rush. Went with 3 stop hard and 2 stop soft for now. Can always add later I guess.