I don't have Starscream nor have I handled him IRL out of box, so I can't comment on that toy.

ROTF Prime, as I mentioned in my previous post, the Leader Optimus Primes are the best made movie Leaders IMO - not sure if they're worth the full RRP though. I got them on sale for $80 each and felt thoroughly satisifed with that. One disappointing thing with ROTF Prime is the swords - how they interfere with arm articulation when retracted. And yes, we know you're Optimus Prime, now shut up!!

I've seen and handled Leader Brawl IRL, and I definitely don't think he's worth it. As the review for this toy on cliffbee.com states:

"A frustrating toy that so easily could have been fantastic. The basic transformation scheme of Brawl hasn't really been expanded upon here - instead the designer has crammed light and sound gimmicks in, and made them far too easy to trigger. The tank mode suffers visually as a result, so the smaller Deluxe works better as a tank despite not having the imposing size. The robot mode displays well, but the poseability is hurt by the lazy transformation and the designer's fetish for electronic gimmicks (the hip cannon). Throw the loose cannons into the mix and this is a very frustrating figure, even if you take the batteries out. Whilst it's not a bad toy, it's far from the great toy it should have been, and there's no way this figure is worth three times the Deluxe, which is more satisfying despite the problems it has with its shoulders. I'd recommend the deluxe over this figure - it's barely worth twice the price of the smaller toy (and that's mainly for the size difference), let alone four times - which is the difference in RRP. I actually find Leader Megatron more rewarding, because while Brawl takes a good idea and stuffs it up, Megatron takes a crappy idea and makes it respectable - 4.5/10"

(you can read this review in its entirety here)

So it's not that the Leaders are terrible... but I've yet to see one that I thought was absolutely worth paying close to a hundred bucks for. At any rate, TRU are selling Leader Sentinel Prime for $69.99 atm which I think is a great price for a Leader