Thanks for some fantastic replies.
The choice between a 1500 or 1850 is still a little tricky for me. On one side I have my daily commute down some very enjoyable country roads where the 1500 might seem a little wet, and on the other the maintenance issues and higher insurance costs which could be better used to keep the car in a nice condition.
In terms of finding a car, the advice of looking for body condition over mechanical condition seems fairly sound although one of the few bits of kit I'm missing at the moment is an engine hoist so any significant work would be tricky. I'm guessing that this is probably a case of it all coming down to finding the right car on the market for me.
30 grand for a rebuild is an alarming figure!
Best to stay away from something that's going to require that amount of work I think. In terms of club membership, I will certainly be joining if I get my hands on a dolomite.
I'm in the Cambridgeshire area if anyone has some good leads for me
Thanks again