Jom
Hi just thought I would comment on JOM coilovers.
I have Arosa 1.4 16v and in standard form the ride was a little firmer than on my old Arosa 1.0 S, also a bit less body roll on corners. I put Jom coilovers on this year when it failed MOT, because it worked out a just under £200 quid for the whole car.
It depends on how you feel about comfort against handling, the ride is a bit choppy and can sometimes be a little annoying as kent roads have many holes and speedbumps. However, handling is firm on corners and feels like a go-cart.
I'm not sure if it is offers huge gains in cornering over the original 16v suspension, but it does give a bit more confidence in the corners. I think if I didn't have to replace the old springs, I may have invested in a rear anti-roll bar, as I think that may offer some improvement over the standard setup.
Hope that helps a little.