Well... have you tried all the things you can do with modular that you can't do with desktop (non-Eurorack). Audio-rate modulation sounds like it would be in order.

Are you planning on doing anything with effects? The Disting is useful but it's a jack-of-all-trades. A Z-DSP and a Bitbox would go well in that empty black hole that's begging for your money. I didn't see a dedicated delay module either.

You might also reward yourself with an extra filter that doesn't offer what the MiniBrute has under the hood... waveshaper/waveform folder... oh... and a couple flavors of distortion/overdrive?