Recommend me some graphics intensive games!!

[scottie]

Hey all, I'm about to be getting a fairly new and shiny computer

Either

CPU	Intel® Pentium® processor T4500 (2.3GHz, 800MHz FSB, 1MB L2 Cache)
Operating System	http://www.microsoft.com/genuine">Genuine Windows® 7 Home Premium (32bit) (includes recovery partition for Windows® 7 Home Premium 64bit)
Screen Size	15.6" Widescreen HD TruBrite® Display (1366 x 768), supports 720p
Memory	4GB DDR2 (2GB + 2GB) (800MHz) expandable to 8GB
Storage	320GB (5400rpm) SATA
Graphics	ATI Mobility Radeon™ HD 4530 (1855MB Total: 512MB discrete memory + 1343MB shared memory)

Or 

CPU	Intel® Core™ i5 processor 430M (2.26GHz/2.53GHz, 1066MHz FSB, 3MB L2 Cache)
Operating System	http://www.microsoft.com/genuine">Genuine Windows® 7 Home Premium (32bit) (includes recovery partition for Windows® 7 Home Premium 64bit)
Screen Size	15.6" Widescreen HD TruBrite® Display (1366 x 768), supports 720p
Memory	4GB DDR3 (2GB + 2GB) (1066MHz) expandable to 8GB
Storage	500GB (5400rpm) SATA
Graphics	ATI Mobility Radeon™ HD 4650 (2815MB Total: 1GB discrete memory + 1791MB shared mem

Sorry for the fail tables, highlight them and they become readable.

Also, inb4 'get 64 bit or you wont see all your ram'

Anyway, tis the first time ever that I'll be capable of playing games with good graphics, so I need some recommendations. Anything really, Strategy and RPG particularly.

Specifically, I've heard good things about Borderlands. Is it actually good?

Also, if I like Battlefield 1942 and BF2, which new or upcoming battlefields should I be looking for?

Oh, and is 7 Premium 64 bit what I should install?

Cheers