Hey Sarah,
We had a brief spell where we questioned the need for tumble dryer and whether it justifies the expense. We went ahead and bought one and now find it indispensable. Unless you have someone who is pretty much based in the house the whole time its a major hassle to dry clothes without the dryer. If someone is there the whole time they have plenty of time to organise it. We both work, come home, whack on a wash, stick it on a clothes horse for a while then bung em in the dryer and they're ready for the next day.
Another thing to think of is if you have spent loadsamoney making your place look nice or buying a nice place do you really want to have clothes hanging around on rads and/or rails for the whole winter?
Try searching online for a front loading condensing dryer. Go into DID and if they don't stock it they will be able to quote you on it. I got DID to sell me a powerpoint disher even though they don't really sell them (as they're 'not up to our standard') - just told them it was a short-term light use solution and I'd be going back down to Powercity if they couldn't get it for me. Always shop around and get one of these places to undercut the other.