I'm not too worried about ease of care. I've got enough experience with exotics in general that I'm not too worried. I like large to very large, I like visibility. color's nice...but in practice I've never seen a tarantula I didn't think had nice color. Some are more subtle than others but I haven't seen one I'd call ugly.
Housing's no big deal; I've got tons of empty tanks at any given moment ranging from 5-40 gallon displays.
I guess what it boils down to...something large that'll be relatively visible.