Electoral reform

A piece from seemingly ages ago about how reform could be linked to possible recovery for Labour.
I have to say I would favour some reform. The thing is, what to replace it? It's so important to have MPs with constituencies, so anything which breaks that link will not find my approval.
An interesting proposal is the French system, where if a candidate gets less than 50%, the top two run off so that at least one person has got 50% of the vote.
Alternative Vote would be a good one, where something like the London Mayor system could be a good one. Rating candidates in terms of preference, then knocking off each one with the least votes. There are problems with this as some people get multiple votes, others only one.
There are far more problems than easy solutions, and i wonder what form this solution may take