I'm looking at upgrading a small workgroup with a 4.11 server to NW

1) I'm looking at HP servers - good and value for money? Possibly the
150 G3 - about 500 in the UK - any comments or alternative
suggestions for a small workgroup or 10 users with a low volume DOS
database application?

2) Also - where can you buy an upgrade from 10 user 4.11 to 6.5 in the
UK - I can't seem to find someone to do this.