The Bilstein 5100 front strut assemblies are meant for use with the stock coil springs, and will perform and function fine with the stock springs. If you did want to upgrade, the only real option is currently Eibach's Pro-Lift Coil Springs which help improve handling and off-road performance without a drastic difference in ride quality. However, Eibach's springs will take your truck up to 2.7" of ride height over stock, which can give you a hint of rear rake and throw off your UCA angles to the point that getting an aftermarket UCA would be a good idea, especially if you're off-roading your truck.