I can't comment on the C&L (I went with the JLTII) but I highly recommend Fred and Evolution Performance. Like many have said already...Fred is a great guy and his tunes rock.
06 Mustang GT Premium, IUP, Tungsten Grey, Dark Charcoal Leather, 5 Speed Manual
Mods: DD Black Bullitts (18x9, 18x10), BFG KDW2’s (255/45, 285/40), JLTII CAI, SCT Xcal2 w/93 Octane Tune from Fred @ Evolution Performance, FRPP 4.30's, Eibach Pro-Kit, Tokico D-Specs, Steeda Adj. PH, Steeda HD PH Brace, Steeda G-TRAC Brace, BMR Strut Tower Brace