Among good cases, there is no difference in cooling performance. More airflow beyond a point just doesn't do anything.
And which looks the best is entirely subjective to your tastes.

I'l link to a couple of good cases.

Bit over $100.
Coolermaster HAF-XM. $110
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119257&Tpk=HAF-XM

Coolermaster Storm Enforcer. $90 ($10 rebate)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119240

Corsair Carbide 400R. $100
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139008&Tpk=Corsair%20400R

NZXT Phantom 410. $85
http://www.newegg.com/Product/Product.aspx?Item=N82E16811146093

Antec P280. $98 ($8 rebate)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129179&Tpk=Antec%20P280

Antec Eleven Hundred. $98 ($8 rebate)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129178

Corsair 550D. $150 ($20 rebate and 20% Promo)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139012&Tpk=Corsair%20550D