I don't have Vista, don't want it and have no idea why anyone else would,
I tested Vista in the TechBeta and have been running the RTM Ultimate
version since November in a multiboot configuration with XP on a nearly 5 yr
old system, certainly not state of the art hardware (P4 2.53 GHz, 1GB PC800
RAM, ATA drivers. It runs well and I like it.
There are many reasons to like it. Integrated search, graphics off loaded
to the GPU, significantly increased security, Ready Boost, Bitlocker,
improved support for Tablet PCs, reworked network stack, totally redone, two
way firewall, much better memory management, significant changes in group
policy capabilities, speech recognition is a real gem, very fast clean
install, Complete PC Backup, expanded Help and Support, improved power
options, capability to do system restore by booting the install DVD,
increased capability in disk management to shrink/expand partitions and
create new ones, ability to create expanded partitions using vssadmin,
network and sharing functions centralized in the Network and Sharing Center,
language packs for the Ultimate version, parental controls, Windows Photo
Gallery, significant improvement and expansion in the performance and
diagnostic tools, and some nice eye candy, to name some of the reasons.
XP feels dated by comparison.
That said I believe the decision to upgrade should be made after due
consideration and research. There should be a reason to upgrade, (of course
if you just want to have the latest, fine). Purchasing a new system is
certainly one good reason. I would not get XP on a new system. Also the
upgrade is not just a throw in your DVD and let it go thing. You need to
research it and prepare. As with any new OS there are hardware driver and
software compatibility issues.