Hi Lassie,
I owned one years ago, used it as my server.
It is an awesome system, very expandable.
The case is almost laughable. About as heavy as a sherman tank! The heaviest Amiga every created by a long shot.
Like the 3000D it is built with all the best stuff of any Amiga. The workmanship and pieces are top shelf, it feels like quality (Just don't move it by yourself).
IMHO is had 2 improvements of a desktop.
1. It dealt with heat better than a 3000D.
2. Lots of expansion slots.
Other than that, a 3000 D is a better choice for me. It fits on my desk and is a nice tidy package.
Market prices today for a tower, fully working a spec'd out will cost you about a grand or so.
Have fun...
