Just spotted this.
Yep, I agree, ITs won't really be the best option for warmer/smoother (or at least not in my hands :lol:). They help you get to "harder" strat sounds. I would happily play this stuff on my ITs, but...
Do you know what does suit classic rock n roll, though? Apaches, all day long... :D.
I'm really surprised no-one has mentioned this already... And they push an amp (set for the blues/rocknroll thing) just as hard as ITs do. In fact, more so from a "rock n roll" tone point of view.
I've not tried Slowhands, so I can't comment on them really. But I do have the impression that they have a less "vintage" rock n roll vibe (which is why I've never really considered them for myself). So if Joe Bonamassa is higher priority, then Slowhands are maybe the boys. If Chuck and 70s/80s Eric are the higher priority, I'd say you owe it to yourself to think about Apaches as well.