Alienware Aurora

Hey

Was going to buy an Aurora wanted to know if this is a good setup for gaming and other basic to upper mid level functions

Intel® Core™ i5 750 Quad Core 2.66GHz (8MB Cache)
Genuine Windows® 7 Home Premium, 64bit, English
CrossfireX™ ATI Radeon™ HD 5670, 1GB GDDR5
4GB Dual Channel DDR3 at 1333MHz
1TB - SATA-II, 3Gb/s, 7,200RPM, 32MB Cache HDD
24X CD/DVD burner (DVD+/-RW) w/double layer write capability
Integrated 7.1 Channel Audio
525 psu

Just want to know if is a good setup, if anything needs to be tweaked like psu or video ect input would help.