Mike,
I don't generally play keyboard in the band - tho' I have been known to on occasion !! LOL
My primary instrument(s) are guitar and bass, and I also use a Roland GR-33 guitar synth along with the guitar. I get the strings and piano sounds mostly from it. Not that they are better quality than a keyboard, but more for being able switch back and forth with relative ease - if you've ever had to play keys with a guitar hanging off you, and need a quick switch back from keys... you know what I mean !! It can get ugly real quick !!
I actually own FIVE keyboards - a Roland XP50, a Korg PA80 (hence my presence here

) and Korg Triton Studio. There's also a diddy Yamaha and a Casio toy floating around here somewher.... So - despite my lack of live playing experience - I'm in the right place !! LOL

Regards,
Steve