3 lbs. Crystal is quite a bit, yeah. I use 1.5 lbs. in my amber and I think it gives just the right touch of sweetness to balance out the hop flavor. Mashing lower will also help, try 151.
As far as hops go, try using the same sort of hop schedule you would use for a pale ale - 60 min. addition, 15 min, 5 min, and dry hop. You can do a 30 if you really want it hopped up, but you'd be overshooting style by quite a bit.