I always use witch hazel after a splash of cold water. I'll be trying out the scented witch hazels when my bottle is done; that Thayers Lavender that Disburden mentioned sounds nice.

As for aftershave, it depends what day it is for me. On work days I use Jack Black Aftershave Cooling Gel. Once in a while I'll use Nivea (Sensitive) Post Shave Balm. On weekends or non-work days I don't use aftershave.