hmmm.....600 odd euros for a close ratio gearbox!
i very much doubt it, maybe its more of a short shift kit. Anyway, it all depends on what ratios you use. On my clio cup car, i had a very tall 1st gear meaning i could reach 60MPH in 1st. But 2nd,3rd,4th &5th were so short that i had to chang between them all the time. But thats the whole point of a close ratio box. Your never expecting to go less than 50MPH on a track so this is in 1st gear at high RPM. And the rest of the gears are kept inbetween 5000-7000 rpm...but you usually never go below 5500 rpm. Anyway, your 0-60 time will be slower if u use a tall first gear, but acceleration through the gears will be better..get me?
If you choose to use a short forst gear to improve acceleration, then you will loose top speed as your using shorter gears. I would personally get a shorter geared box overall, reducing top speed but increasing acceleration, unless you plan to use it on the track....then just by the clio cup sequential box which is the dog b****cks!!