TrackIR IMHO is a must for IL2.

I can't imagine myself playing IL2 without TrackIR. I even wanted to buy Birds of prey as it offer nice graphic. But i keep trying to turn my head when i try out the demo. LOL.
15mins into the game, i figured that the BOP is not a game for me.

In fact in wide screen mode it uses the full width but as its still generally 4:3, it cuts a bit from the upper lower area of the length. So its not stretched, but clipped. Not a 100% support of widescreen. Its a personal taste, if you can live with it.
If you own a TrackIR it's a moot point

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IL2 is still by far the best WW2 Flight Sim. Period.
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System Spec:
CPU = Intel Core 2 Duo E8400 running @ 3.7GHz
Memory = 2 x 2GB DDR2
GPU = GTX460 1GB GDDR5
Hard Disk = 7200RPM SATA
Sound Card = Creative X-FI Extreme Music
HOTAS = Logitech G940
Monitor = Dell U2311
OS = Window 7 (64bit)