So i have Leadtek PX8800GTS GeForce 8800GTS (G92) 512MB and i am thinking about going SLI, would it be safe to get a PNY VCG88GTS5XWB GeForce 8800GTS (G92) 512MB? would they work together? also, if i do this is there something else in the sub 200 dollar range that would out perform 2 8800gts in SLI?