I am currently looking to purchase a new head for my ampeg cab wich is 4 ohms and a pretty great flat tone cab. I wondering wich amp or amps have the greatest reliability record and kicken bottom end and also upper mid so my tone is crystal clear supper punchy with great bottom. I use active and passive basses 4 and 5 string basses and I hate distortion and noise. Don't mind paying out some bucks and I just don't want any problems like I'm having with my Hartke head I don't care for it too much I don't think it has the greatest tone. I like jazz funk and heavy rock. I looking at the Mesa m-pulse 360 and wanted some feedback on that head or any other head one would suggest around 600 to 850 bucks. Thanks!!!