I'm picking up a second Ampeg 4 ohm 15 cab to use with my Ric 4003 and so my PF500 just isn't going to cut it anymore. Which is too bad because I LOVE the tone but I don't want to get a power amp and just use it as a pre-amp just so I can use my cabs...but I love the cabs just a little bit more. Besides the Carvin B2000 (tried it and I couldn't dial out the grindy, edgy, modern-y tone) which amps that are less than, say $700, go to 2 ohms? It has to be at least 500 watts. I've looked into the Hartke LH1000 and that seems like a decent option. I like warm, fat, thick bass tone. Give me some direction!