Oh yes, I totally agree... If I were to break down how much each factor contributes to phenomenally better handling it would go something like this:
Performance Plus Suspension: 75%
Ultra-High Performance tires: 20%
Proper tire inflation: 4.99%
20mm Staggered Rear Wheels/tires: .01%
As I've posted in many other threads, I'm a big fan of the Hankook Ventus V12 evo 2 summer performance tires. About $200 each. Note: not available in the staggered 265mm size.