Nah, the GTX 460 is fine for most games; search 'your games' against the GTX 460. Also, that MOBO will easily do 2-WAY SLI and 3-WAY SLI sooo you have room to grow! Also, the X58 is superior to the P55 chipset, and duh so is the 4-core+ 4-thread i7 950.
i7 950 QPI 4.8 GT/s - 6,328
i5-760 DMI 2.5 GT/s - 4,570
PassMark - http://www.cpubenchmark.net/high_end_cpus.html
WIN - WIN - WIN!!!