Hi Tom
I know exactly what you mean regarding the styles on the SD1. When i first tried it i instantly found good usable songs and dances for the SD1 styles, i didn't find that with the E80 i tried but I'm sure there in there.

However, I'm starting to find that there is a lot more third party styles available from Roland and others for particular songs that will go a long way to help.
Good luck with your G70 and keep me posted
Cheers
Sandy