I have auditioned Sony SCD777ES and Sony SCD1, I think SACDs are much better than CDs and like SCD1 a lot (but a bit pricey for your budget). For used 777ES, you might be able to get it for $1500 and SCD1 probably $2200+. There are a few on Audiogon right now on sale.
The other thing you might want to consider is to mod your 9000ES. there are a number of upgrades and mods possible.