Honestly, I partially picked him because I've been a fan of his for a while and I was thrilled to see him back on a big team. I did think he'd have a good year but frankly his cost is high (532) and there's still a good chance he won't turn out to be a good buy, though things are looking good with his start (259 so far).
Well, to be honest I had to put my team together extremely quickly and without the chance to read through this entire thread so I didn't really look at the three side-by-side, although I did briefly consider Boonen.
I never considered Cunego. Seems like his GT gc days may be over, he rarely wins stage races, and seems to have lost some of his sprinting punch. I think the chances of him going back to those 1200+ days are relatively slim.
Boonen traditionally scores a bunch of his points in sprints and he doesn't seem quite as fast as he used to be.
Also, it seems like more and more people are focusing on, and getting better at the cobbled classics. i don't think he'll ever dominate them the way he used to. I mentioned above my thoughts on Ricco.
Like Ventoso, I always follow Cobo and knew he had a horrendous year so he was always going to be on my team if it makes you feel any better.