Just bought a Triton, I love the machine, but not the sounds. Can I add a good sound module and still use all the features on the Triton? Very definitely a newbie. Thanks

What type of sounds are you looking for?

Solid realistic sounds, brass instruments, keyboards (I like Rolands 60, 70's keyboard expansion card). I know there is a Korg Piano Exp. card and I'm wondering what the price is? Thanks.