Thanks Adamoxiye, GreatLakesBass, mdalamond, marc40a, LowWay, Joshofbass, and Andt V. for sharing your insights and experiences. I'm kinda new to pedals, and definitely new to digital/midi worlds, so this is all helpful. Thanks!
[I'm drawn to the SA stuff b/c of the stereo/dual mono possibililites. I have two 'stereo' basses. I'm exploring this: bass > EQ2 > Aftershock > Atlas > Arkham Abyss > Quilter BB800. Yes, it all gets summed to mono, for now. ;-) ]
I went fully stereo about 3 years back and then realised that I didn't need to go full stereo across my whole board. Basses aren't stereo, if they have 2 outputs...it's just a seperate channel for each pickup.
For me, I'm single input from my Hog 2, C4, Atlas, Ultrawave and Spectrum. Then my Lunar output is stereo into my EQ2, H90, Nemesis and finally out from my Ventris output ports. I tend to find modulation, delays and verbs really work best in stereo. Dirt, octaves, filters, synths...seem to work best for me in mono / single input.
That said, I've had a lot of fun looping out 2 back into Input 2 on my C4. It's great feeding an octaver back into a filter on the other channel and then passing them to output 1. It's amazing what this tiny pedal can do.
Quatschmacher uploaded a number of great C4 and Spectrum patches with this feature. They are very cool.
These days, I prefer a dedicated Filter pedal so I can choose specific dirt and compression from my Ultrawave and Atlas. I frees up my C4 to synths and octave patches and lets my Spectrum just deal with filters and low pass filters....which it's rather good at. Sure, I can do 95% of this with just my C4 and looping patch cable, however I need the flexibility of control during a live context. A lot of the Source Audio pedals can be very deep and cover a lot of ground. However, I have the board space and I like more control than a single pedal often provides me.
I still think in most genres, Source Audio is best of breed. Especially if you like pedals single type pedals that do that thing exceptionally well. Vertigo, Ultrawave, Lunar, Atlas, Spectrum, C4, EQ2, Nemesis, Ventris....all very much best of breed for their genre.
In a world of Multi-FX pedals, Source Audio chooses a different path. It's a bit like choosing the best hi fi components, but reaching for the top row each time....yeah...I'm a self confessed Source Audio fan boy. They started to win me over with their gear years ago with the AfterShock. Since then, they have been building and building such great and novel gear.