Going over the car during off season, found my 15 year old QA1 Double Adjustable are leaking. QA1 told me years ago don't do anything to them until they start leaking so here we are. Should i just have them rebuilt? Buy new ones? Buy new different brand ones? I know there are better shocks out there but do i really need them for my setup. 4 link, 2450 lb door car, 750 hp NA with new motor. Bracket car. Looking at Penske, Viking, Strange (reg and Ultras).