If you want something 10 - 15 lbs then I wouldn't suggest a blood, although if you get one that's young there's no saying you won't be able to get used to it as it grows...

I love bloods, what can I say. The care is pretty much the same as balls, but they get a bit heavier in body. I've got one that I'm keeping my eye on for the end of this summer so I can get it shipped up here, and they're awesome pets.