I'm currently running the KW Variant 1 system (equivalent to the Mopar Stage 2 package) with excellent results on my '03 PT GT 5-speed. I like the ability to adjust the ride height and not worry about corrosion since it is stainless steel based and has a lifetime warranty. The ride is firmer than stock with less bounce which improves handling quite a bit (some would say dramatically). However, if you're after maximum performance, in addition to the coil-over kit, I'd recommend upgrading the sway bars with the Eibach kit and add a front strut tower brace like the BTG/PT-Tuning. Further, I'd upgrade the tires with a lower profile and a stickier/wider/summer tread, I use a 35 series. As good as the KW kit is, you won't get the full benefit of handling improvements unless you do all of the above.
__________________
 [IMG]|2003 PT GT 5-Speed | Mopar Stage 1 | Mopar 2.5\" Dual Exhaust | Mopar Short-Throw Shifter | Mopar HO Plastic Intake | Mopar Boost Gauge | AGP WGA/BOP | APC Carbon Fiber Taillights | Axis 19x8 Wheels/Yokohama 225/35ZR19 Parada Spec2 Tires | BTG Strut Tower Brace | BTG Billet Shorty Antenna | Eibach Anti-Sway Bars | HKS SSQV BOV | JLM Motor/Tranny Mounts | KW Variant 1 Coilovers | Maxxfab 3\" Downpipe | NGK Iridiums | Prototypepower UCP/CAI v5 | PTeazer Smoothie Roll Pan | Screamin\' Demon Coil/Livewires | StopTech Slotted Rotors/Hawk HPS Pads/Stainless Steel Lines | Unorthodox Racing Underdrive Pulley|
|