I don't know about Soleras, but I put Bilsteins all around on my 06 Ram 1500, and it helped some. The factory is now installing Bilsteins as stock on Rams. The thing that helped me the most on sway was the addition of LT tires. Those "P" rated tires have too soft of a sidewall- LT's fix that very well. Also added Hellwig helper springs to the rear.
/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi
Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks