Really? Maybe it doesn't get as cold on the coast as it does in the high desert, or maybe it's just because I ride year-around, but I use heated gloves for half the year for my 65 mile 0400 commute.Never needed heated grips or vest out here on the cali coastline, so i also cant help you.
Could be that I'm just a sissy, I guess. ~20 degrees at 80mph makes my fingers hurt.
To the OP - I don't know if heated grips are an option, but gloves and a vest should be OK - it depends on the wattage you want to use.