Hummm, I might have to look into the HD Line. I love JL amps! I just sold a 500/1 and 300/4 slash series. I wanted some thing powerful but smaller so thats why I sold them. What exactly do you like better? Tone?, features?Hey, lagamm, I have pdx amps in my Honda (1 pdx-4.150 and 2 pdx-1.600) and I've got to tell you I totally prefer the JL HD600/4. This will give you the same power 150x2 and 300x1. Don't get me wrong I love the pdx's but the JL Audio HD is awesome.