I have been reading and listening to clips on basstasters.com and I like the sound of the Thunderfunk more than anything else. I would jump on it if I came across a used Thunderfunk, but I am hesitant to buy a new 550. The Carvin B1500 seems to get really good reviews but I am sort of concerned that a lot of the comments are about how much "headroom" you have with it. Headroom is nice, but I don't feel like I need a so much I can only turn to 2 or 3. But I really like the price of it, and a lot of people like it. How does the tone of the Carvin compare to the Thunderfunk. Are they completely different? What amps sound similar to the Carvin?