I bought a uBraids from Michigan Synth Works. Can't complain. I bought an O_C and Temps Utile from a Modular Grids member/maker. They work perfectly as well. Message me and I'll give you the name if you wish.
Read up on all the functionality of the OC... it even has a dual sequencer that can output gates as well as envelopes. So if you get in a pinch, the OC can deliver envelopes or your quantizer or even an extra shift register (but only one set of functions at the same time).
As far as your matrix sequencer, you might want to check out Noise Engineering's Mimetic Digitalis. The functionality is similar (but not the same) as the Tip Top unit. It's only 10HP and about $100 less. Pair that with a second O_C and you should have even more options in 18HP rather than 28HP. You can also save the state of the O_C and the Mimetic Digitalis, which is a big plus. With that extra 10HP, you have room for another 10HP VCO or 5 2HP units.
I know, so many options...