Bartman,
The S42 looks like a nice machine, but the price is over my budget (plus it would cose even more for a 3D/2.5D machine).
Custer, wow! I read your experience. What an awful thing to go through. I can see why you're so against Colinbus.
Anyway, I took your advice and looked around again. I came across a couple of alternatives. As you say, though, "it's a lot of money to get wrong" (even though my budget is less that yours). So, I'd be really interested to hear people's opinions on these...
Marchant Dice.
Their machines
appear to do what I want, are within my budget, and even use ball-screws. I think I could get started for just over £2000
Range:
http://www.worldofcnc.com/products.asp?recnumber=177
Specifically, MDL-A4-BS (BALLSCREW), MDL-SBOX controller, Kress 1050FME spindle (plus collets etc), "MACH3" software:
"http://www.marchantdice.com/forumimages/cnc_milling_machine_catalogue.pdf"
It looks like they also sell on ebay (cheaper than their catalog?)
"KIT Desktop CNC Machine Engraving Milling Router"
Spec:
"http://www.worldofcnc.com/images/MDL-Machines-Router.pdf"
Prototools.
Heiz S-400 CNC Machine (5-Channel Controller) - X=400 mm; Y=300 mm; Z= 110 mm
"Heiz S-400"
They came back with very helpful covering letter and a quote (to include a Keress1050w, plus collets, bits, software - in fact, everything to get me up & running) for about £3000
This is about £1K over budget

- but tempting

) HOWEVER,
that is for trapezoidal. For a ballscrew version
,
"Heiz T-400"
I'm looking at about £3800 !!!
The more I look, the more confused I become...