Gavin, what is it you're looking to achieve ?
You can mate pretty much any telescope to an SLR, but there are several different designs that are optimised for certain jobs. For instance, the scope Stuart has suggested is great for the Moon and Planets (although you really don't want to be using an SLR for the planets) but not so good on Deep Sky.
However, if you're wanting to do Deep Sky, the scope is the wrong part of the kit to be looking at first off.