I currently have a TS212 and a TS312 and run them in stereo. Essentially I purchased my Helix LT about 9 months ago and also picked up a 212 to give modelling a go with a modest investment. Ended up buying the 312 to give me stereo which is great. I have several great tube amps, bluesbreaker, DRRI etc. And I have to sayIt’s taken a lot of tweaking, Celestion IRS etc but I have now got a giggable rig. Still not the full tube amp experience but it is less hassle.
Using a low cut at about 100hz and a high cut at about 7k is a must for me. Takes away the unrealistic frequencies your not going to hear with a trad amp. Honestly thought about upgrading from the Altos to Yamaha or QSC but not sure I would get a much better sound for quite a bit more dosh. Still not sure I will switch over completely, I don’t have or have ever used in ears so I am kind of replacing my traditional back line with two Altos. Essentially it’s not much more convenient but it’s been an interesting experience. So much so I have even thought about a Fractal...