I know very little about pumas, I hear mixed reports about the dash and heater/aircon I like the look but being over 6 foot I'm told it's not good on the knees. As for engines I like clockwork hence the 200tdi but the 15p TD5 is a good engine and one of the tdci's is better than the other (can't remember which) but both you will need to get to grips with diagnostics. Salisbury rear axles are stronger but rover are easier to repair in the field. TD5 chassis rot for a pastime not sure if puma got better. The spud shaft between gearbox and transfer box on pumas can have wear issues. Personally I'd probably go older and use the extra money to bring it up to purfect condition, I would consider a late TD5 with a mint or galvanized chassis and a Salisbury rear axle but aircon on this dash style is awful.
Mike