I do own a 33. But i could never shake this feeling that the 32 is the best overall performer. At 1500 kg curb weight and 4545mm length, it is the lightest and shortest of the 3 models. It's torque is 36 kgm at 4400 rpm while the 33 has 1.5 more and the 34 has 4 more at the same rpm. The little difference in the torque is compensated by the difference in weight and length. It may not be a looker, but overall I think it is the best. The cockpit is a bit dated but it has it's own character - it harks to the 60's functional and purposeful look. No more and no less.
The handling is nimble - much more response than my 33. Throttle response is much faster as well due to the weight factor. In a 33 or 34, the same could be obtained for a price - carbon fibre body parts will do that. The engine is the same - so careful and wise mods will turn it into a really powerful car. Mine has 380 whp and the 323 which I drove has 362 whp - and I felt the 32 was more nimble and responsive. I'd never driven a 34 but I would guess that it is not that far away from my 33 in terms of handling. If that was the case, than the 32 is a better choice.
The problem with the 32 is it's age. From 89-94.....so the most recent 32 you could ever get would be years old. The engine might have been trashed. If there is a low mileage 32, than it's ok.
That's my opinion.
Go to UK Skyline Register site - really a good place for infos on the S'line.