I see your point pal but this weekend I did a track day with my mate Dan who has a stripped saxo, with an LSD. I couldn't hang on to the back of him, he could get the power down so early in the corner and with no worries at all.
I'm not trying to be funny but I guess its not a mod done to clios very often is because its not H&R coilovers and silvervision lights. I think an LSD is a great mod for when doing trackdays, and as I will be doing more and more, I think Its a well worthwhile mod. IMO
I do see what you say about the Quaife though, Dan as the Quaife fitted to his saxo and loves it. I'll jusrt have to have a think and decide.
Cheers