Is this the best gaming pc for $430

It would be better if you filled out this form and told us what your budget was and what sources you wanted to get parts from.
http://www.tomshardware.com/forum/261222-31-build-advic...
posting links to the items you are considering would also be helpful.

the PSU you picked is terrible.
these are all good budget PSU's

XIGMATEK NRP-PC Series ACXTNRP-PC402 400W
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
or
Antec VP-450 450W ATX 12V v2.3 Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
or
Antec EarthWatts Green EA-430D Green 430W
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
or
CORSAIR Builder Series CX430 V2 430W
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

make sure the GTX 460 isn't the SE version, it is much slower than a real 460.

never heard of the ram maker "crossire" make sure it's DDR3 1333 or 1600 and is should be 2x2gb sticks, not a single stick.

MSI NF750-G55 would not be my choices for a motherboard. I would choose an AMD chipset rather than a nVidia chipset. I would also go with intel for SLI or get a newer AMD 990X MB (see below)

this MB is SLI and Bulldozer ready for $40 more
GIGABYTE GA-990XA-UD3 AM3+ AMD 990X
http://www.newegg.com/Product/Product.aspx?Item=N82E168...