My head quest is turning toward Eden after a WT-400 blew me away the other night. Munji may just be right about their stuff. I'm seriously considering a lower power rig, but would feel a little better about 500W at 4 Ohms than 400W. It's not a volume issue, just fart protection - I realize 100W isn't going to make an audible difference. Headroom, however, is good. Anyway, has anyone compared these two side-by-side? What I've read here implies the WT-550 is basically an upgraded WT-400 and sounds the same, but I'm looking for confirmation. Also, can anyone advise typical street pricing on Eden stuff? The dealer I was at always prices at full list and then negotiates - I didn't want to waste his time since I'm not going to be ready to buy for a month or two.