I did a lot of research before deciding on the specs for my machine, but Jack from Omni has been very helpful through the process. OMNI are very flexible with customising the specs of their machines.
I also had a lot of good feedback from Jason in NZ (http://www.cnczone.com/forums/chines...ordered-2.html)
I only have 220V Single phase so I am going to build the Shopbot vacuum system here -> Black Box Vac Source - Let's Talk ShopBot
I'm looking forward to getting my machine. Will keep the forum up to date with progress. Specs below.
1300 X 2500 X 300mm vacuum table (4 zones + combined T slot)
3kw water cooled spindle
2000 X 200 rotary axis
300mm Z upgrade
30mm HIWIN rails, 32mm TBI ball screw on Z
Helical rack and pinion