Tumble dryer - vented or condenser?

[DonkeyTeapot]

My washing has been sat on the airers for about five days and still isn't dry, and it's starting to smell. Our not-used-very-often dishwasher has just packed up, and we're thinking of not replacing it, but getting a tumble dryer instead.

Does it make much difference whether you have a condenser or a vented one? Any brand recommendations? Thanks!

Btw, purely out of curiosity, and because I happened to be washing a 1 litre jug, I measured how much water it took to wash up this evening - it was between 10 and 11 litres. That's all the washing up for the day, but it was a fairly light day and there are only three of us :)