Personally this is just me but I have 2 yukons an 01 and 02 both with zw7 suspension, and I tow...... I tow a lot, my 30 ft camper, carhauler with full size trucks etc...... I converted my 01 recently with the billstien conversion kit and I regret it so much. Don't get me wrong it is a great ride ..... empty. I lost so much towing capacity I kick myself daily in the ass for it. So my 02 will get oem nivomats with a 25/3500 spring load cap for rear. Also if any of you get a lot of body roll check for your little bumpers mine were missing so a timbren kit is also up soon with both sway bars upgraded to a larger diameter. As far as the nivo mats and lifts I would think it's fine just so long as the kit comes with spacers. Thinking back now I spent probably the same to convert as I would going new oem so if you tow, at all! Stay oem.