You're fine going with a 7950 as long as you're playing at 1080p resolution or higher. Really you're fine for anything except multi-GPU setups at 1080p+.
Thanks for the response BigMack! I intend to stick to 1080p+ gaming on one monitor with maybe
the option for a 3-monitor set up in the future. I figured the 7950 would sufficiently future-proof me for the next 3 years or so until I have no choice but to build a new system.