What is a good choice for a good handling Cafe Racer motorcycle?

Since this is Motorcycle Racing Section, I would have expect some one with Vintage Motorcycle Racing experience to have inside knowledge of a good base motorcycle to build a high performance custom bike.

I was thinking maybe a Suzuki GS1000 with a late model GSXR1000 front end, Brembo brakes, Machesini forged set of wheels, with Pirelli Supercorsa SC2 race tires, and a Penske Shock on the rear end... I am not knowledgeable enough on vintage bikes. I was considering a Kawasaki KZ1000, but I heard the handling of that bike is some what sketchy. These two are big heavy bikes.

Keep on mind I will be doing regular track days, and handling is very important to me, more important than raw power...

Not a vintage GSXR1000 lol

I meant a GS1000

I meant I would remove the old components, and replace them with a late model GSXR1000 front end, Brembo brakes, Machesini forged set of wheels, with new Pirelli Supercorsa SC2 race tires, and a Penske Shock on the rear end...

To make a Vintage look bike, with modern technology in suspension components, geometry settings, brakes, light wheels and sticky tires.

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Not a vintage GSXR1000 lol

I meant a GS1000

I meant I would remove the old components, and replace them with a late model GSXR1000 front end, Brembo brakes, Machesini forged set of wheels, with new Pirelli Supercorsa SC2 race tires, and a Penske Shock on the rear end...

To make a Vintage look bike, with modern technology in suspension components, geometry settings, brakes, light wheels and sticky tires.