Definitely going with an outdoor antenna as I pretty much have no other choice.You have three VHF-Hi stations you need to get. WTVT (use of call letters is always preferred over network affiliations), WTSP and WFLA/WTTA. Whatever you get, it needs a pretty good VHF-Hi component. I'm assuming you're going on the roof? I don't think it's doable indoors.
I've been looking at the Televes LR antenna - I'm leaning towards that one at the moment.