IMO, the WT400 was the warmest of the Eden WT series. Solidly built, great Eden tone (given you like the Eden tone), clean with a nice amount of warmth, super flexible EQ, and really not too heavy at about 12 pounds. You can rack mount it or transport it in a carry bag. I used a carry bag for times when the head was being transported by me - not in a truck.
I wish I still had mine!