vicho09,
You will guaranteed loose the plush stock ride comfort with the firmer valved shocks & stiffer springs that Old Man Emu kits are known for. They are primarily designed for modified and heavily laden vehicles used off-road, but there are on-road benefits as well.
My 4runner is light weight and mostly stock... LT rated all terrain tires and rear drawers that weigh 240lbs. I run OME #2885 (medium) front springs w/ Nitrocharger Shocks, and OME #2895 (medium) rear springs w/ #90005 (heavy) Nitrocharger rear shocks. The body roll, lane-change stability and highway handling characteristics are *significantly* better than the stock XREAS suspension w/ 120k miles on it. I also ran the heavy #2896 rear springs on #90005 shocks.
The trade off is an overall stiffer ride over potholes, man hole covers, speed bumps and expansion joints when the truck is empty and has less than 1/2 tank of fuel. Once there's 400+ lbs of cargo drawers, water and camping gear - the ride quality is super compliant both on and off road.
If I didn't plan on ending up with a super heavy rig, I'd consider the Old Man Emu #2884 (light) front springs with corresponding OME shocks, and #2895E rear springs with the standard #90004 Nitrocharger shocks (which are 15% softer the the '90005's). If i planned on keeping a lightweight rig and I just want to clear larger tires without loosing ride comfort, I'd look at Toytech or Bilstein 5100's with OEM rated springs.
If you need pics for reference or additional details, let me know.