I had the RD45, and I can tell you, there's NO better amp on the planet in it's price-range. I had to choose between keeping it, and the EVH 50, and kept the EVH, simply because of the added resonance knob, for deeper bass. But, if you have a 4x12, it's a non-issue - I don't. But, I can tell you, it's a killer amp. I'm actually missing it, and having some remorse. Not sure what your hesitation is, but, you won't regret it! I just didn't want 2 "modern" sounding amps. If you go to MF, and enter code "fallsale13", they drop to $524. ALOT of tone for the coin.