Upgrade to Vista? Hell no, I don't think my logging laptop could take it, old ass Compaq 386/25 with 1mb RAM. It does just fine with DOS 3.31 and Windows for Workgroups 3.11.
Seriously, I have played with Vista on my home desktop and it is way too buggy still and it is a resource pig. I would wait a bit until the next SP is released at a minimum.
'04 Beige on Black 40th Anniversary GT, O/R-H, LTs, MagnaFlow Catback, JLT RAI, Xcal II, 75mm TB/upper, Comp Cam EE Stage 3s, 3.73s, CHE LCA/UCAs, & MGW Shorty. 298hp/304tq