Aeg L16830 Or Zanussi Zwd16581w ?

The AEG should be the better washer dryer because although both are made by the same company (the Electrolux group) AEG are supposed to be the more upmarket version. In reality I don't think there is a significant difference but AEG are definitely the more expensive brand and probably at least have more features if nothing else.

Unfortunately, at the moment, both these brands are not scoring very highly with Which? In regards to rinsing efficiency although the AEG is otherwise rated quite highly by them. In fairness, the majority of modern washing machines seem to fall short of the Which? rinsing tests, which I put down to a side effect of making washing machines use less and less water.

You say they are both, "reasonably expensive", and I know what you mean but in the great scheme of things the truth is that they are actually both reasonably cheap. These are low to mid-priced washing machines and bearing in mind they are washer dryers with 7 kg capacity drums they are actually pretty cheap. There are other washer dryers available with smaller drum capacity at twice the price.

A large 7 kg drum on a washer dryer should be quite useful as it increases the drying capacity which is commonly around half of the wash capacity. You could consider a higher quality washer dryer with a smaller drum capacity and a longer a guarantee but it would be more expensive even though the drum is smaller. Overall these are probably as good as it gets for the price range and drum size at the moment.