Here is a list of everything I want in my budget gaming PC, please let me know if this is a good build! I got most of it from Logan's $500 PC build video, but changed some of it up according to how I would like it.
List:
BIOSTAR B75MU3+ LGA 1155 Intel B75 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard
Drop the GTS 450 and go with the GTX 560SE as that's more cheaper and better. http://www.amazon.com/EVGA-GeForce-GTX560-Graphics-01G-P3-1464-KR/dp/B007TMXFE0/ref=pd_cp_e_2
is the ram I would tell you if your weren't getting a b75 chipset, which with sandy chips only run memory at 1333, you can't make it go faster or change settings, you'd be better off going with a z68, z75 or z77 chipset for 15 bucks more
i totally agree with you, the gts 450 is already 3 generations old while the gtx560 se is from the previous generation, it will give you a lot more performance :)