I have an 05 ST and I'm putting a decent size audio system in it. The amp is an Audison Voce 5.1k which calls for 120amps at full tilt. I have no idea what the original alternator amps are rated at so I was wondering if you guys new and what alternators you use in your cars. I need one that's 120 + whatever the rest of the car asks for. I'm looking at a dcpower 250, it's a little pricey so wondering what you guys have. Thanks in advance!