I think ukparents is the place to talk to lots of clothies and get lots of answers. There's a cloth nappy forum there which seems to be the meeting place for on-line UK clothies.
I have used terries (naps you have to fold into shape yourself) and fitted (naps that come in a ready-made shape). I prefer the terries, but the fitted have their plus sides, too. Most of my terries are 2nd hand, and I've been pretty happy with Motherease wraps, but there are other good ones about. The Mothercare liners are crud! I like the Boots liners because they're durable enough to reuse or toss if dirty.
If you wanted fitted, TotsBots are very well-liked. I like it best of the UK fitted naps I've tried (but I prefer my Puddlecatchers most of all).
On the cost front... I've going to confess that I calculated all I've spent on naps so far (including washing costs), and I've spent about as much for one child in cloth as I probably would have done to have him in disps.
However, that's partly because I didn't just stick to cheap & cheerful terries, I had 2 babes in nappies for a while, and I had to buy more naps. The first system I tried at nursery didn't work well, so that was some money wasted, especially as we went to disps for over a year. The naps still have resale value, so I might see some money back. I am definitely seeing a cost savings now with my 2nd baby.
We only put out one rubbish bag every 4 wks or so, which wouldn't be possible if we used disps. So that's nice.