I hate GAZ coilovers, remember when the white TB'd car had them put on by Mehdi and we went for a blast and despite being able to spank me in a straight line it just showed how good stock setup is as round the twisty stuff I wiped the floor with it.
I've only had experience with Leda's and Avo's, but for the money the Avo's win it for me. Driven 2 lives quite a bit over the years and it's a little bumpy at times, nothing bad though and it handles superb, certainly be better on track, just not round some pot holed B roads lol