I'm trying to find a recipe for either a pound cake or sponge cake that is dense enough to carve for 3D cakes but yet is still moist and tasty. Does anyone have a good recipe? It can be for either a doctored box cake or a scratch recipe as long as it's yummy and carveable I don't care which.

Try the WASC cake recipe - I use the original but there are a few on here.

Here the link:
http://cakecentral.com/modules.php?name=Recipes&sort=recipename&sort_dir=ASC&op=search&chname=X&chingredients=X&searchtext=wasc&cat_id=-1&x=&y=