Due to a serious lack of work space, I can only have a benchtop model. Also, due to an even more serious lack of money, I've just ordered the cheapest one available in the UK http://www.angliatoolcentre.co.uk/woodstar...k-pid23833.html
Obviously, it won't be as powerful as the more expensive ones, and the table is a bit small, but as I don't build a lot of guitars, it should last me quite a while, and I can always make an extension table to go round it
EDIT:
Well, it's arrived (ordered yesterday afternoon). As expected, the table is ground aluminium and it doesn't tilt, but that doesn't worry me. I've tried it with the 2 inch bobbin on a lump of oak, and I can't slow it down, and the finish is very good, so I think it was a useful bargain