fatevo,
Forgot to ask what your purpose is. Is it just to have a 600hp monster on the street? Drag? or Twisties (circuit). If its on the street and circuit, then a high torque car is what you want. When I had my TODA kit installed, complimented with HKS 3037S, 272 cams, custom intake manifold, Trust intercooler, Motec, etc. The car was one hell of a roller coaster ride. Torque was uber fantastic. But I feel that topend was lacking.
If its for drag racing, then forge pistons and chromemoly rods are ok. Cheaper too. My current setup is 86mm pistons, rods, lighten crank, stock stroke. 100mm TB, custom intake and a Garret T64 turbo (had to grind the block a little to clear this bugger

) The car ran 10.9 seconds at 126 MPH running 1.5 bar boost, rev limit at 9500 rpm. It ran with A/C, power steering and full interior. Although I did change the bonnet and boot with carbon fiber pieces from Monster. Boost does come in very late, but when it does, it pins you on the seatbacks and keeps you there until rev limit. I had people throw up after a ride. At the least, some were screaming in the car and some were white and speechless for awhile after the ride. And mind you it was a straight line run and not turning. Must be out of fear
Good luck on what you decide and let us know how it comes out.