Disklavier

Hi all.  I have an MX100A disklavier. My local Yamaha retailer is 
getting out of stocking PianoSoft titles, leaving me nowhere to buy 
(hopefully) quality performances locally, and I don't necessarily 
want to buy from Yamaha's web site.

I have done the usual of downloading MIDI files and converting them 
to ESEQ as my machine needs to play, but all to often the 
performances are (not to put too fine a word on it) CR*P!

My question is this - can you point me to web sites where good 
quality MIDI files are available - most of the stuff I have 
downloaded recently is poorly sequenced and badly played, and it's a 
waste of such a fime instrument just to play rubbish.  

My tastes are Beethoven (Appassionata is a favourite), Mozart, etc, 
plus some jazz and bits of modern music.  Any ideas?

Season's Greetings