Hi Gareth - I use a Durst M707 and can highly recommend it. They're very sturdy and well built. Covers everything up to 6x7 and has built-in condensers for 35mm and medium format that you can change with a simple slide switch. There's also a switch to swing the colour filters out of the light path.
A few things I'd recommend:
1. Whatever enlarger you buy, try and find one where the seller is throwing in loads of negative carriers and anti-newton glass etc. These can end up costing more than the enlarger itself if you're not careful.
2. I use a RH Designs analyser as an f-stop timer. Again, highly recommended, but maybe something you want to look at later if you really get into darkroom work. Makes life much, much easier, saves a ton of paper and does neat things like automatically turning your safelight on and off. Details here:
http://www.rhdesigns.co.uk/darkroom/
3. Buy a new safelight. The filters do wear out, and for the money it's not worth ending up fogging a load of paper before you realise your safelight is a dud.
4. Buy a decent easel. Cheap lightweight ones can be a pain to use in the dark. RR Beard ones are great.
5. Get hold of some Ilford under-lens multigrade filters. They're a lot simpler to use than dialling in the filter values using a colour head.
6. Durst Neonon enlarger lenses are great value and very good quality.
Good luck with getting it all up and running. Don't hesitate to PM if I can help with anything.