You have the same concern as I do. Body roll doesn't bother me, it's the rear tire plunging into the wheel well too much and often.
Let me know if you get a quote. I will next week when I get home. God, I sure hope it's not yellow. Find out if they can be painted!
Sorry for the delayed reply here!
First off, I'll just say that I love the sumo spring addition! It really has tremendously helped the ride, with so far no negative side effects. suspension flex seems like it would be limited, but it's really not - they compress to less than half their height...and since they get progressively stiffer as they compress, it's an excellent bump stop. I had no sway bars after doing SOA (I didn't want their limitation off-road, and figured I didn't really need them on-road) and body roll had been something I considered a 'fun' part about driving my rig on the freeway...until I greatly reduced the body roll with the sumo springs, and found my truck even more fun to drive
As far as color goes - the dark blue ones are what 4x4 rigs would need (my rig ain't light either - just over 6000 lbs when unloaded). they are the 'lightest' duty - but more than enough compression resistance (and not too much) to do the job. The yellow more heavy-duty ones are for RVs and motorhomes - much heavier. They don't make the the same version in different colors.
As far as I know, they can be painted (but would probably have to continually be repainted since they change shape, likely causing paint to flake off) but I don't mind the color.
Mine are mounted with two 1" spacers (also from superspring company) in the rear, and no spacers in the front. we added some 'landing pads' that are offset a little towards the inside, so that if the axle is articulated, the one spring making contact is making good contact) - and on a level surface with no weight in the truck, there is about 1.5" of space between the top of the sumo spring and the landing pad - which so far is seems like the right amount (of space before the sumo springs have an effect).
The 'builder kit' is what you want to get (
https://www.supersprings.com/instructions/INS_SFR-104-40.pdf ). Price was about $450+tax (free shipping to me since I'm in CA, as is the company).