I also use a Sony DVD Mega Changer to solve a few problems. It works very very well.
I can't stand Sony's interface either, so I use my PDA and
DVDLobby PPC to select the DVD's. I find this quite a good solution but the software hasn't really been developed enough for me to totally get rid of a remote, I also use a Logitech 890 to great effect. People are always impressed with DVDLobby and it only costs $35 for what appears to most people to be a really high end system option

Looks very nice, I don't think I'll bother posting a picture of my set-up after seeing that

Cheers
Cris.