I, would like some advice on another piece of kit to compliment the octa because i feel slightly limited by the 8 track sometimes but not all the time.i seriously know what you mean (been a fan of over the top DAW multichannel polyphonic extravaganza all my life) but recently, thanks to the OT, i found out self imposed limitations can work wonders
anyway: personally I most often feed the OT with a turntable, an electribe SX, an Analog 4, a vermona DRM mk3 and an OP1 hooked through a mini mixer so the two input pairs on the OT are enough.
but after doing two 12"s using the OT as the centerpiece I'd say the korg electribe would be the first choice. it's a no brainer when you look at the specs: at a decent cost you get a machine that has nice drums, synths, stabs, memory to sample custom ones and an almost knob per function interface = lots and lots of tweakability and hands on manipulation (but forget the onboard effects). just invest in better tubes and it's a reeeeeeally rewarding combo with the OT!