I went with the Daystar kit on my wife's Renegade. I bought it BECAUSE it had the rear sub and carrier bearing relocation brackets. Avid's kit seemed nice, but it left the drive line untouched. Companies like Daystar, which are well established, aren't going to add unnecessary parts which would cut into their profits. However companies will certainly leave parts out if they can to increase profit or reduce sale costs. I'm not saying that's what Avid is doing, but when I asked them if they had done something with their kit to negate the need for relocating parts, they never responded. Hmmm, that's a little odd.
I'm not saying that a more expensive product is always better. However when a company that has been around since 1977 has more parts included than the company that's been around since August of 2016, I'm going to trust the one that's been around longer a bit more than the new guy. Especially when the one that's leaving out parts doesn't tell me WHY they're leaving out parts, or how they were able to eliminate the need for them. It seems too convenient that they're skipping "minor" parts and related installation steps to keep the cost down, and make the install seem easier, so they can complete. Maybe not, I don't know, and they never replied to help me understand. Avid may make great products, but they've only been around 2 years (1.5 when I bought the kit), so their products haven't been around long enough to see if they hold up, or if they have any long term affects on the vehicle. Without having a history to back Avid it's hard to assume that Daystar increased cost for no reason. I've got to assume their engineers added the spacer to the carrier barring, exhaust hangers and rear subframe for a reason. If any of you are wondering, installing those "extra" parts wasn't an issue either.
I'm not trying to bash Avid, they seem like nice kits. For me though, I didn't need extra ground clearance, so if lowering the rear sub back to the same ground clearance saves my drive line undue wear, I'm all for it. I bought the lift for looks, if I'm doing any serious off-roading I'll take my Wrangler. Maybe I'll be proven to have been skeptical of the Avid kit wrong after folks have used them for a few years. Till then, my wife's Renegade isn't going to be the guinea pig.
Also to note my references. I got the dates the companies were founded from the BBB.
And here's a shot of my wife's Renegade Limited (with Daystar lift), with my stock Wrangler Sahara. I've been looking at rims/tires for her. I think we'll end up with some rims from a Compass Trailhawk, wrapped in 255/65/17 tires. I didn't want to get rid of the 18's, but you pretty much can't find an AT or MT tire in that size.