OS: Windows 7 premium 64 bit
CPU:Intel(R) Core(TM) i7-2600 quad-core processor with Turbo-Boost [up to 3.8GHz, 8MB cache]
RAM:8GB DDR3-1333MHz SDRAM [2 DIMMs] (thinking of bumping this up to 10gigs for only about 50$ more)
VIDEO CARD:3GB DDR3 NVIDIA GeForce GT 545 [DVI, HDMI, VGA]
HARD DRIVE:2TB 7200 rpm SATA 3Gb/s hard drive
Mostly worried about the video card with these specs
any estimations on the FPS I'd be able to achieve with these specs?
Your video card is the only limiting factor. It is about equal performance to an 8800 GT, according to Tom's Hardware, which is a 4 year old card about.
You won't need anymore than 8gb of ram unless you are going to be doing some form of video editing/processing. Also, spend the extra cash and get the GTX 560 ti or grab a HD 6950.