I think they have just as much potential or more as the 1st gens. the frame is made a little better on my GV than a first gen I noticed.. more substantial frame rail up fornt and a better bend up front. my GV was pretty capable stock especially with the sway bar removed and with the lift I'm doing it will probably blow it's old self away.
I would get that tracker if I were you.. they are righteous!
go to calmini.com
rocky-road.com
boondoxmotorsports.com
check out what they have in store for it