While I still don't get my head around Clouds, the Miverb, included in the alternative Parasite-firmware, is in my opinion a fantastic reverb. Emilie discontinued Clouds, but there are clones around by After Later Audio or Tunefish Modular.
As for mixers, the Doepfer-line offers fantastic value for your money. If you like to DIY, you might want to look at the Befaco STMix as a kit. Not the easiest build for a novice, though, the layout is quite dense.