[kilps]

You want to be careful of plain old proportional representation. We have that here in South Africa and the result has been MPs who toe the party and line and have no ties to constituencies (I asked a couple of parties which MPs they assigned to my area, they either didn't know or just didn't reply).

That said PR is still a better system for representing minorities and forming governments - so personally I favour a hybrid model, possibly with a different house for each system.