Welcome to the forum Eoghan
1) I've used online stockist a few times and never had an issue. They'd get a recommendation from me without hesitation.
2) I have not personally owned either, or even seen an MRF in the flesh. Of the two I'd be more inclined to go for the SF as the ones I've seen have all been very nice bats.
3) I refurbished a Newbery Tomahawk for a teammate last season. I wasn't overly impressed by the bat, it picked up nicely and felt reasonably responsive, but just didn't feel right in my hands (but bats are a very personal thing so you may love them!)
As for the TON Legacy, I don't own that particular model, but I do have an SS (or 5) in my collection. They're very nice bats if you can look past the OTT stickers and rather heavy concaving on some models. They're a very typical indian shape so there's a lot of wood low down, but they pick up nicely in my opinion.
Hope this helps