Man, if you plan on sticking a mATX board into a HAF 932 that's going to look ridiculous! Not to mention it'll be a total waste of space. If you're into going to LAN parties often then I think you should go for the Tt Lanbox.
I went from a CM Stacker 810 to a Thermaltake Element G and I don't regret it at all! It's a beautiful case all around with great features and exellent cooling. I was debating between it and others like the CM Storm Sniper, CM HAF 922 and Silverstone Raven. I eventually decided I didn't want the Raven because it's price was a bit too high and I didn't want another full tower. I decided against the Sniper and HAF 922 because they both don't have black interiors, and no fans on their side panels.
For features, quality, and price I think the Element G is one of the best deals out there. I'm surprised that not too many people have them.
Not meaning to threadjack but hows the wire managment in the Element G? and whats the distance between the back i/o panel and the hard drive bays? enough room for a GTX260?