I bought a very similar model last May, partly because I could install XP on it for myself.
Few retailers of note offer XP at all.
Absolutely no snags except that the PSU 's fan was a bit noisy, and I have since changed it at my expense for a Thermaltake.
I think many contributors are over anxious about the rating of the PSU. Novatech would not fit a 400W model if they felt it wouldn't be enough. Adding every sort of peripheral later would change things.
Add to that, the certainty of fast sympathetic attention if there is a fault....
.....Bought my first laptop from them less than a month ago. It had a marginally faulty WiFi card which was replaced by return at no cost to me except a a couple of brief telephone calls diagnosing the fault.