I would rank them in this order
SP2022
Cougar (though not very far behind at all...close to a tie)
CZ P-07
SP2022 - SIG's sleeper gun. Not many know about them, but they are excellent guns. Used in some other countries for armed services/LE. Same great DA/SA SIG trigger (some say better though, since you have metal on polymer instead of metal on metal friction), same SIG reliability (I used to own a 9mm, it gave me 0 problems), and same (though it just looks different) SIG manual of arms. Only sold it because I thought the grass was greener with a different pistol, but I regret that decision. I'll get another one later
Only con is that it's not much lighter than their classic metal line. SP2022 weighs 29oz, the P229 (which is of similar size) weighs only a little more, 32oz. Instead of getting a weigh savings by going to polymer, you get a cost savings. Both are cool in my book, but I wish it were lighter
Cougar - Sweet shooting gun (I owned one in .40 a while back, got offered to trade straight across for a Glock 19, I couldn't pass that deal up) with a cool rotating barrel system. Recoil wise, the .40 Cougar felt like shooting the G19, though I was actually more accurate with the Cougar. Go figure
They will be about the same price as the SP2022, similar size as well. I think I paid $399 for mine about a year ago or so. The only problem I had with mine was that I had about 5 or so FTE's, and that's the only reason I rank the SP2022 above it. I also don't like (okay, I hate) the safety on this gun, but if I were to carry it, I would just go with the safety off. The safety lever is in a strange (to me) position, it wasn't easy to manipulate, and well...I just don't like safeties! It's DA/SA, I don't need anything else!
CZ P-07 - If you want a CZ, make it a metal one. I've not heard good things about the P-07. I was close to buying one once, but ended up buying something else instead. There have been reports of the frame bulging/bubbling, yet CZ says that's normal. Umm, yeah I don't think so. I've never seen any other polymer gun bubble. The trigger on the P-07 did not compare to the others either. It was overly heavy, gritty, and squishy. Again, if you want a CZ, make it a metal one. Leave the polymer guns to other companies (Glock, SIG, XD, etc)