I have no experience with the others, so my advice may not be too terribly much help to you. Still, I can say I have a size 58 S2 built up with 2003 Record 10, Rotor 3D crank, Quarq power meter, TT Q-rings, heavy Centaur cassette, hand-built alu clincher wheels, Garmin 500, iLink cables, no gruppo tuning and it comes in at 15.9 pounds (7.2 kg) real ride weight (computer, cages etc - but a simple pack of tools goes in a sticky pod in my jersey pocket - so no saddle bag is on on the bike). Not a light weight, but definitely not a boat anchor and I could easily tune it lighter as its a pretty stock build (looking at another project and wishing to tune that bike, so this one is as-is pretty much). I race it with tubulars but don't have that weight handy atm. Stiff and a nice ride to boot. It would be familiar to you too coming from a Soloist. It also has a fantastic warranty (provided you get it new) and a good crash replacement policy. I love it, but ymmv, and like I say, haven't ridden the others.
Yes, life time warranty definitely worth considering.