I'm not going to lie - I got a little confused here at first and thought your Clouds clone was the Marbles clone. That definitely changes my view of how playable this rack is at the moment. If you like ambient and techno and sound design and want to sync with an external drum machine but don't want a giant rack right away, a Marbles would be worth a look. It gives you random CVs and random gates that can be internally quantized to scales and rhythms, clocked externally, or set to be completely chaotic. It's about as practical as randomization gets, and it can be used, among other things, as a very flexible 3 track CV/gate sequencer for your voices. Clouds has a cool sound and goes great with a drum machine, but a voice/effect like that needs plenty of modulation to make it move and sound like it did when you decided to buy it. There is always the option of getting smaller versions of each, but I leave that to you, since they are nicely designed in the original format. And it will sell if you decide you want something different later on.
I'd also suggest a Mutable Veils clone or an Intellijel Quad VCA (or both). I'm not a Mutable obsessive or anything, but Emilie Gillet made several very efficient modules that cover a lot of ground in a small space and lend themselves well to real music making. Whatever you choose here, though, they will make what you already have even more fun.
You'll want to do as much of your own research as possible throughout all of this, though. Your modulation is just as much a way of getting your personality into your music as the sounds, if not more, and you'll want to tailor this to your needs as you go on. Once you have the Disting, you can run through that and it'll be a much more hands-on way of testing stuff. VCV Rack is also good for this - you can try free software versions of hardware tools and test the musical output of various systems to see if it's something you want to work with in hardware form. They even have ports of Mutable Instruments modules so you can test stuff alongside their version of Clouds and Marbles and Veils and Plaits or whatever else to see how it would work in your system.
I guess if you're already used to 2hp, their sample and hold module is pretty helpful. Sample and hold is one of those classic modulation sources that can do lots of stuff, from sequencing to random voltage generation to a sort of analog "bitcrush/downsampling" effect - and having two means you can do it in stereo. It pairs perfectly with a Pam's. to trigger it, or any of your VCOs if you want to do some audio rate stuff.