Thank you everyone, very much, for your input. I will certainly look into all these options.
I've been having super fun fiddling around with putting modules in and out on the modular grid app. So far I have come up with the following, including Plaits (which I have already bought).
Plaits
Maths (Make Noise) - seems to be able to do so much and I like the fact that I don't understand it!
Telharmonic (Make Noise) - another funky looking oscillator
Stages (Mutable Instruments) - I think I could use it for envelopes, triggers and LFOs
Ripples (Mutable Instruments) - seems like a safe bet for a filter and can also be an oscillator and LFO
Doepfer A132-3 Dual Linear/Exponential VCA - figuring I'll need at least two VCAs
Narrow Mini Mixer (Doepfer) - guess I'll need one.
Disting Mk4 (Expert Sleepers) - maybe use an effect but also be good in case there is anything else I need as it appears to be able to do almost anything! I like the fact I could use it as a sampler or another oscillator.
What do people think?