Ok so I believe i have built the perfect rig for me personally, but that endless gear tweaker itch won't go away. I should state too that my practice rig is just an Ampeg PF-350, SVT210AV, and Line 6 M13 for effects (Chorus, Flange, Delay etc.) My main rig: 6 Space Road Case Korg DTR-1000 Furman Power Conditioner SansAmp RBI DBX 266XL (I am having separate thoughts about upgrading this but a separate topic) Hartke HA3500 ( Preamp Bypassed by running the rack chain into the effects return, input to the SansAmp) Cabs: (I did it this way to take advantage of 4 ohms from the HA3500, while also matching cab power ratings both 200w cabs, and getting something close to at least a 610 in height without actually having to lug around a 610 or "gulp" an 810 (ouch). The 15e is crazy light compared to the rack and the 210 is perfect for practices) SVT210AV SVT15E I've had a lot of time off playing due to the pandemic and have spent months sculpting my tone through the SansAmp, compression tweaks, routing changes etc. I believe I have found a tone that really works for me. Very thick, with some harmonic breakup, smooth, and growly. My question is is there any value in entertaining the though of upgrading, or swapping out the head? Say for an SVT3-PRO, or even a B2R since I'm bypassing the preamp and effectively using it as a glorified power amp (Although i do use the Hartke EQ and contour controls to sculpt)? Or should I just take comfort in finding something that sounds really good and not trying to chase perfection? I don't even know how much more a different amp would impact the sound if I'm bypassing the preamp. I've become somewhat of an Ampeg fanboy but am not entirely locked in, i just like that dirty growl breakup sound over crystal clear transparency. I should also note, that if i do upgrade - I would be leaning towards something a little lighter than the HA3500 if possible as the rack has not gotten quite heavy with the doors on (something like 65+ lbs) I though about using my PF350 but 1. i like to be able to carry that around to practice, and 2. I like using the rack for live gigs. so I am hesitant on exploring mounting the thing to the rack. Sorry for the long rant and thanks for any feedback positive or negative.