to me eden's flagship is the preamp in the WT series units. The tone is NOT uncolored, but it's a pretty nice color. They tend to sound warm compared to other similar units, but not woolly. they're only loose in the low end compared to some ultra tight sounding units like the demeter preamps. For the most part, without an A/B comparison, it's not something you'd remark upon. the enhance is best used very sparingly, and the eq is very powerful, so tiny adjustments work best.
the cabs are cool, not the best, and not the worst by a long shot. The poweramp sections of the heads are a wee bit underpowered (but most heads are IME). Probably one of the biggest drawbacks to me is the lack of a line out to run a head with a separate poweramp. (yes, the headphone out is supposed to run like this, but it still runs off of the master volume and i'm not 100% convinced it's as quiet as a regular old line out).
A navigator and a 550 are on my wish list - i had a 400 for a long time and had to sell it. The only other complaint I had with the non B series is that they were only stable to 4 ohms. The 2 ohm stable amps aren't really all that louder, but the ability to hook up 4 cabs is awful nice. I've used my pal's 550 into all 4 of my bag end cabs and it sounded great and was LOUD.