Back to your original question...

How big is your room? Unless it's quite small, I doubt the VTF/STF-3 would "overpower" you. Just because it can go louder, doesn't mean you have to push it that hard. You'll still benefit from it's lower extension.

Personally I'd go with the VTF-3 MKII if your budget can swing it. When I bought mine, the VTF-3 was $849, and I couldn't afford that. (I still LOVE my VTF-2 though!)