Actually, I hummed & hah'ed for a while (always a good thing as I often change tack!) then I happened upon a reasonably good site (well, by Chinese Standards anyway).... http://cncdiy.org/ ...they've got a 'which CNC is best for me' matrix listed on there ...and he actually makes some important points. I guess we're all guilty of trying to spec/buy a jack of all trades CNC machine , but as he poijnts out that's a mistake...I really only need a small machine to mill acrylic & PCBs, but I was going to buy a larger one in case I needs to do something bigger, but with size comes weight (obviously), noise, vibration, flexing etc (not welcome if 90% of my stuff is small anyway!).....so I'm just going to buy the minimal I can get away with size wise & go for this one (which his matrix recommends for PCBs)...

https://sites.google.com/site/cncdiyorg/2520 (I reckon about £600 + import duty + VAT)

if push comes to shove, I'll get a larger one for my other needs at a later date.