sfplay~ reads from disk so you will have problems with how files you can play at once. You could use play~ or wave~ but this choice depends on how you want to control the sampler. polybuffer~ is also the logical choice for this. CPU load shouldn't be a problem unless you're running an antique system, but memory could be if you've very long samples.

For the keyboard thing you could also have one keyboard and set up a control to move between two different layers. Depends if you need to actually play both at the same time or if you're just triggering samples.

Thanks Mark!

polybuffer~ is that an object, or do you mean cuing the samples through a poly~ that has a buffer~ in it?

The samples aren't too long, so it seems it will be fine.

Your right about the keyboard, I can totally get by with one. Any recommendations for a MIDI pedal controller? Of course I can look, but let me know if you can think about anything...

Thanks to this post I have solved my Polyphonic problems. Thank You Mark!