it is hard to say because various benchmarks done in the past shows wildly different results, but that was because the operating system (windows) wasn't optimized.
do a search for SSD in the hackintosh macbook nanos. people use ssd with leopard in the eee pc and dell mini.
when would you ever be in an environment (and using the mbp at the same time) where you would benefit from the anti-shock.
also, the mac start up times are so quick, it wouldn't be that big of a difference, in my opinion.
besides, since the hdd is not easily upgradable, it might be worth it to go for the max size instead of ssd