The Azenis are designed to be extremely sticky in the dry, passable in the wet, and that's it. They're loud, they ride rough, and they don't last too long. My kinda tire.

The Yokohamas are indeed nice. They're a good tire if you want above average roadholding, decent comfort and reasonable treadwear. Oh guess who told antarius to get em. This guy!

In the 205/50-15 size these are the more common "summer" tire choices:

BFGoodrich g-Force T/A KD - Excellent dry grip, very good wet*. Poor noise level, ride comfort, treadwear.

Bridgestone Potenza S-03 Pole Position - Excellent dry and wet traction. Fair noise level, poor ride comfort and fair treadwear.

Bridgestone Potenza RE730 Gen 2 - Very good dry and wet traction. Fair noise level, fair ride comfort, good treadwear.

Dunlop SP Sport 9000 - Very good dry traction, excellent rain traction. Good noise level, very good ride comfort, good treadwear.

Dunlop SP Sport 8000 - Very good dry traction, good wet traction. Fair noise level, ride, treadwear.

Falken Azenis - Excellent dry grip, very good wet*. Poor noise level, fair ride comfort and treadwear.

Kumho ECSTA Supra 712 - Good dry traction, good wet traction. Fair noise level and ride comfort. Good treadwear.

Yokohama AVS ES100 - Very good dry traction, very good wet traction. Good noise level, ride comfort and treadwear.

* = Although these tires have very good wet traction they do not resist hydroplaning very well.

Me personally, I'd pick the Azenis because they're so good and so cheap. Cost no object the g-Force KD's will out grip everything this side of an R-compound in the dry but they're twice the price of the Falkens.