Nich, for your 5.7 Comp. Cams makes some good ones, but the ones I installed in both my Hemi vehicles is the FRI Engineering Sidewinder cam, made by Comp. Cams. It's been around in the LX community for over 7 years and is well proven to be a reliable performer and worth about 50 hp. when used with a good set of headers and cat. back. I advanced the one in the WK 2 degrees over stock and the one in the LX I advanced it 6 degrees. Normal highway fuel economy in the WK is ~22 mpg, and normal in the LX is ~27 mpg.
05 LX/RT and 06 WK/GCO, (modded similarly) with MDS "ON" Light, Vortex Gens, Debadged, DashHawk, BT Catch Can, SRT CAI W/Add Air Inlet, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tuning App, DS Tuner, Cust tubular headers w/3 in. catback, Bilsteins, SRT frt/rear bumpers, Eibach SRT Lwr Sprgs & Sways, FRI Sidewinder Cam Adv 2*, 6.1 valvetrain, SLP 25% UD Pulley, BBK 85mm TB, SOS Coils/.060 spark plug gap.