As far as limited space:
Get the Moogs out of the rack as Lugia suggested.
Here are some recommendations:
Expert Sleepers Disting Mk4. I find it clunky to use. But for the price and the space it's hard to beat. The module offers a lot of functionality. I used it as a wildcard in my patches as well as a great sampler (not musical but like a box of chocolates) of functionality. Do I need a dedicated quantizer, precision adder, etc? If I find myself using a particular function over and over, I probably should investigate buying a dedicated module for that functionality.
Ornaments and Crime/Temps Utile (micro versions): Each one is around the $250 mark. They are multi-function modules as well. Same principle as above.
The Disting is 4HP, the O_C and T_U are 8HP each. So for $700 and 20HP you get a boatload of functionality for a very young rack. As you learn more and want to expand your capabilities you can grow your rack around them.