Killer Filler never claims to play 100% surf, but when they do, man, look out. A huge part of their sound is attributed to Crispy's prowess on instruments with keys and frets. So yeah, I think organ/synth/keys can add a lot to a surf band, but given the choice, would prefer a musician able to pull double-duty.
-murph
—http://www.reverbnation.com/elmiragesurf
http://www.reverbnation.com/aminorconspiracy
"I knew I was in trouble when the Coco-Loco tasted like water!" -- morphball