Hello Judd,
I would recommend the Yamaha MSP5's . The Keyboard amps will not play in stereo . Msp5's are powerful and offer the stereo capibilities.
Roland has a smaller pair of powered monitors called MA12c's . Great for an apartment and priced around $299.99 a pair.
The P80 is a very nice piano. Having a weight of 40lbs is a plus as well. It is a little thin for most generic keyboard stands.
Be sure to try a few out before you buy the stand .
Recently Roland came out with a piano called an RD150 to compete against the P80 . The RD150 is same price and worth looking at before you make your purchase . If you have any other questions you may contact me by email oneils4@home.com or Call me at Guitar Center in Towson Maryland 410 821 5200 .
Good luck.....DanO