My hand is 7" and is just slightly too large to palm my G-Pro, but perfect for claw and finger grips - the G-Pro may work out. Since you "grip with my fingers but like to rest my palm" sounds like you are more of a claw man like myself, and I tend to switch between claw and finger quite often. G-Pro is a good choice.
Check out RJNs reviews on the
G-Pro and the
G403. Since the G102/G203 is the same shape as the Pro, check out the
review on the G102/G203 it may be also worth a look.
cheers