Durable AM3+ motherboards

I am currently researching computer parts to build my first (casual) gaming PC. I am on a tight budget. I am no hardware whiz and still learning so bear with me.

I chose to go the FX-6300 route simply because of upgradability to Steamroller later on. However, the i5-3470 is very enticing especially if I invest in an aftermarket CPU cooler for the FX which brings the price of i5 CPU+mobo very close. I don't plan to upgrade before at least 2-3 years. Initially, I don't plan to OC but I would still want to have a mobo capable of that just in case. I am still undecided on the GPU but it's between the 7850 and 7870 (LE?). I will not CF/SLI. I don't need anything fancy and for whatever its worth, a good ol' HDD is all I need for storage.

After some research I found that these 3 mobos are among the most decent ones price/performance wise.
Gigabyte GA-990FXA-UD3
Asus M5A97 R2.0
ASRock 970 Extreme3

Now, the question is which one is the best in general and in terms of manufacturer support (i.e. providing BIOS update for Steamroller based on their historical support record)?

Of course, if there is a better mobo (price/performance) that suites my needs, I am open to suggestions as well.

Just to provide some more info, my budget is CAD $1100 (including tax + shipping) which should buy me a whole system (w/ OS, monitor, keyboard, mouse)