for those who have had GR-2's on your car for an extended period of time- how long do they really last? for a 1.5" drop do they go pretty quick, or do they seem to last 30,000mi+? im torn between the koni adjustable inserts and GR-2's for the scoupe front. i am leaning towards the koni adjustables in the rear because its a full strut unit but the fronts are the inserts. for an extra $100 i dont know if i want to bother replacing the inners if the GR-2's will last. i know konis will hold up to a drop for a good period of time but will the GR-2's?? if youve had them on your car for 30,000+ miles please let me know if they have held up. again this isnt a huge drop, its about 1.5 or 1.7" or something like that. thanks in advance.