Seeking opinions on modifiers

I currently have four 43" umbrellas and a Cheetahstand qbox24 (24" x 24").

I am looking to add to this. I recently purchased a quad flash bracket to increase my speedlite power by 2 stops. I am considering a 120cm octabox (Apollo Orb knockoff) or a ~60" shoot through umbrella. Below are the links that made me consider a very large umbrella.

http://shootingonabudg​et.com …/2013/10/4wayfl​ashBTS.jpg
http://shootingonabudg​et.com …1.8d-4way-86inchwhite.jpg

I know that outdoors, the octabox will behave much like a 43" shoot through since I will not be as concerned about controlling spill. However, the octabox will be much better indoors because of the control.

The extremely large umbrella may be good for outdoors because of the large light source which would create a very soft light. I know that the wind can be an issue, but my wife is always around to hold my lightstands .

I shoot outdoors 95% of the time, and play around with shooting indoors sometimes. What do you guys think? Are 43" umbrellas "enough" (get the octabox), or do you think that I should have a larger modifier for full body outdoor shots?

I appreciate your input!

It really depends on what you shoot.

I have a few 60" umbrellas/64" Paul Buff PLMs, as well as an Apollo Orb. I use the PLMs quite a bit, especially for group and full length shots, but they can be a PITA to use outdoors (wind + umbrella = sail) without fully weighted C-Stand supports and an assistant. They do get a lot more use than my umbrellas now since the silver lining is more efficient, and they have optional diffuser covers that allow them to be used like an Orb/octabox.

The Orb does have better spill control, is more manageable, and can still cover H+S or 3/4 length portraits.