I don't know what your goals are, but in this space and retaining at least one of each of the Doepfer modules and all of the more unique modules (the Quantic and the Eudemonia), this is what I'd go with:
Principles I was working from:
1) You don't need so many duplicate modules, especially without having used them
2) There's a core of modules that cover a lot of ground and will excel in any small rack, Links, Kinks, Maths, Disting, and FX Aid (XL or not), and that are generally reasonably priced. I would personally not start a 6U rack without them, the Maths and FX Aid being the most important.
3) Having a sequencer around is always a plus, especially with a quantizer (the Disting), so I added a Tirana II.
4) I aimed to keep the price in the same range, but added about $500. I think it's more than worth it here.
5) You had too many oscillators in the original, not enough utilities. Additionally, the Doepfer VCOs don't strike me as full featured enough for the HP they take up here, hence the Dixie 2+
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