I have read a ton of threads/reviews etc and although there are more multi-effects devices [ and better: Eventide/AxeFX Ultra ], I have narrowed it down to these four: Boss GT-10B Line6 M13 Zoom B2.1 Korg AX3000B I am willing to spend the $400.00-500.00 to get something decent. I would be happy if the Zoom did it. Not really sure about the Korg. Please keep in mind that my main interest is AMBIENT sounds. I do not use distortion/fuzz/overdrive or wild effects. Synth is low on the list. I have a Boss RX-50 loop station so no need for looping. I do not plan on using an expression pedal much. Having the looper and/or a pedal is no problem of course. Finally, I will not be wanting to use a ton of different sounds. Mostly enhancement and variety to fretless bass. I want HIGH QUALITY chorus/delay/mod/reverb etc. And I am NOT NOT NOT a good/patient tweaker. I know that the stock patches are not great and I will have to learn to tweak but the most plug and play model would certainly be preferred. Any and all input is much appreciated. Time to use the credit card.