Here is what I would recommend that u go for
1) 17" Samsung Syncmaster 793MB monitor that will be enough
2) SLI is useless, believe me, U will end up paying a lot more, & the heat issue are also very bad, better go for a 6800GT PCI-E if U want performance, that will do for a long time, if possible, later on sale it & buy a 7800GT when the prices come down
3) 1000 VA UPS is insane, go for a normal APC 600VS one, it will give u about 15 mins backup
4) 3500+ Venice will be a better choice, especially E6 core
5) unless u really need wireless keyboard & mouse, don't go for one, Logitech Internet pro desktop will do fine for U, it costs only Rs 1500
U R from guwahati
, where there, I was born in gawahati