New build... better than the old one?

I decided if i manage to sell my current rig for some nice cash, to buy a new one.

Current rig ---------------------------> Possible upgrade

>Muskinh DELUXE 64GB SSD-------------------> Gona keep it for next rig

> GTX460 SLI Golden Sample -------> ASUS GTX560TI SLI
> ASUS P6T--------------------> Gona decide on the motherboard when B3 hits
> 3x2gb patriot viper 1333--------------> 4x2GB DDR3 Kingston Genesis PC1600 (8 in total, because they are very cheap here)
> 640GB WD 6401AALS BLACK --------------> 1 TB SAMSUNG HD103SJ
> Cooler Master HAF 922 --------------------> Cooler Master HAF X
> Chieftec 750W -----------------------------> Chieftec 850W
> ASUS XONAR DX ----------------------------> Not decided
> NOCTUA NH D14 ----------------------------> Same

Would i get an at least 25-30% boost in perfomace?

Also, dunno if i should buy GTX560TI in SLI or get one GTX580 and pair it in SLI in 5-6 months?

meh

thats barely an upgrade if you go 560,might as well add another 460. also chieftec psus suck, dont skimp out on your psu.

meh

blaznwiipspman1

Very constructive, thanks.