I think retrimmed leather would look excellent (as per retrimmed GTR seats) BUT in suede, not so good.
As everyone has said, if you don't plan to sell it, then do whatever you want with the car cos that's all that matters - if you do plan on selling it one day then might not be the best idea, as what YOU like isn't necessarily what other people like.
For example when i was looking for a 34, i found this one retrimmed in white leather - seats, dash, etc etc. it looked...well...kind of hideous to me, but i'm sure the owner loved it.