Lee customer service is great too. I've gotten free replacement parts from them before without even having to send in the old ones.
Anyway, I pretty much stick to the Lee Collet die Deluxe sets with the collet die, seater and FL size die. Everything you need in one unit (don't bother with a crimp on most calibers). I rarely use the FL die, but it DOES come in handy. The collet die is IMHO the best neck die on the market, hands down (including the expensive bushing dies). The seater is no big deal, but it's as good as the RCBS. If you're into high precision, it's the one die in the set that you may want to upgrade with a Redding/Forester/Bonanza benchrest seater