But seriously, use those until you know exactly which ones don’t work for you then buy stuff to fill those gaps. Reason being is that you have WAY more control over the effects in the OT, besides the fact that you don’t need to buy a new thing.
I’d buy a behringer 303 if you want to do acid techno well. Only the original circuitry or a dedicated clone will do that sound correctly IMO.
If you insist on a pedal I’d get a delay. Digitech obscura is on my list as a cheap delay. I’ve seen them around $110 on Reverb used. Or a reverb but I don’t know any cheap ones that are better than the OT’s.
What effects in the Octatrack don’t you like? The Dark Reverb seems 50-50 split between lovers and haters. I’m a lover but whatever. Similar deal with the filters.
This Zoom multieffects has a lot of fans. The cost of one of these is less than some Boss reverb or delay pedals.
I can vouch for the Line 6 HX Stomp multi-effects, though the HX line costs more than the above Zoom, yet not as much as the Helix.
Korg NTS-1 is worth a look, it’ll give you something to sample into the OT as well.
I have one and think the effects are probably a bit overrated in some reviews, but pound for pound don’t think there’s anything more versatile for the money
I’m using the Mod duo x together with an analog rytm, and it’s a pretty sweet setup for me for techno and house. It’s not particularly cheap though but super versatile. You can get the Mod dwarf much cheaper and it’s basically the same thing with less buttons and knobs. But probably with the octatrack you will not need more than that