Hi to all. I am deciding to get a Bass Pre Amp/ Head whatever you call it. I am undecided between a Mesa Walkabout and an SWR 550x. I heard the Walkabout has some construction problems while the SWR 550x didn't receive good ratings. Anybody can recommend any other good Tube pre amps/heads? I will not be running it through any amps cos I live in a small house.I heard of Carvin, Ampeg etc. But not too sure. My reference would be like (Maroon 5) "She Will Be Loved" Bass Sound. Deep Low End with slight punch. Not muddy though.