You can boost the standard turbo to achieve about 180bhp with correct fueling mods etc and they are really light. Glanza about 920kg, GT which is the earlier version is even lighter.
Handeling is shite as stock due to the old suspension design, but aftermarket bits are easy to get hold of which help things. I run D2 coilovers.
No doubt about it, they are reliable, cheap to run, light and can be modded to kick a 182's with mimimul fuss, but there is more to cars than just speed. It depends on what you want from a car.
The Japanese speed limiter of 112mph is easily rectified also, this is not seen as a problem. You can buy FCD's (fuel cut defencers) for pennies.
I run an Apexi Power FC standalone ECU which gets rid of all restrictions.