Celestion Vintage 30 or Celestion G12-80 Classic Lead (by the way, I own a Peavey ValveKing 112)
i'd look into the hellatone 60, you can find it on avatarspeakers.com. its essentially a vintage 30 but much cheaper, because avatar takes the stock celestion and modifies it.
well, i was wanting to stick with Celestion
^it is a celestion, read this, www.avatarspeakers.com/hellatone.htm. its the one in the middle that is a vintage thirty.