Well, I have the bucks, so I think I'm going to order a WT-550 in the next day or two. I haven't been able to find an iAMP to demo, so I think I'll pay my money and take my chance on the Eden. I can put it up against a Mesa Walkabout that's in a local store once it's here. I sure hope I like the tone with my pair of ag End S15-Ds. If not, it's returnable - and I'll only be out the shipping. Eeek!