Lift for 00 Z71?

[bad habit z71]

I like to tow some heavy loads (anywhere from 1k to 4k) and i do alot of highway driving, but i would like to do a lift.  I've checked around and i like the looks of most.  The RCD sounds good from reviews, the skyjacker looked very good in the picture, i've seen a fabtech lift and it looked nice.. and the rancho seems a little better for highway use (only 4 - 5 inches)

 

Im sure if i go to 4 wheel parts they will steer me towards a procomp.

What tires are those?  What size?

[bad habit z71]

heres a pic of the my truck with 285s

 

i like the look, but not tall enough.

 

 

 

[Threejaws]

I have a 6in Superlift with 35's on mine, just click the link to view.

 

Lifted 2003, 2500HD

[bad habit z71]

how does it do hauling or freeway? ;)

[Dihappy]

For 6" id suggest either ProComp or SuperLift

 

4" Rancho or RCD.

[bad habit z71]

Which kits will allow you to use a heavy duty spring?  Like a 3/4 ton spring instead of blocks?

[Threejaws]

Mine does great on the highway and towing. My has the blocks.Lifted 2003, 2500HD

[k1500chevy97]

What tires are those?  What size?

Those look like BFG at/kos

Dont know about the size though they look bigger than 285s so i would guess they are 315s