err, im going to buy 4gb ram, so i wanna ask u guys tat issit vista 62bit well recommended? i ask 1 guy in LYP, he said 62bit not good, some update it cant support, is tat real?

looks like it, there is no such thing as vista 62bit

for 64bit, there were some compatibility issues in the past, but things arnt so bad now. if you want to use more than 4gb, then it is a must.
does your cpu support 64bit?

look at his siggie, no problem running 64-bit
i am using 64-bit as well, i think besides for restarting problem (which i suspect it's the vista's problem) the rest run pretty smoothly
give it a try if u want to

in terms of support, obviously 32 bit is better.

right now, ntgh really use up to 4gb.