Hey Gang, I did a search already and couldn't really find a good answer to my question. So, at my house I have a SVT 3-pro and an SVT 4-pro. I would like to sell one and keep the other. I have played through the 4-pro some, but just got the 3-pro and haven't had a chance to play it much (read: at all). I have a svt-810e that I'm playing through. This is my first venture into the world of heads and cabs. Anywho, should the 4-pro and 3-pro sound the same, just with the 4-pro having more headroom? Will the 3-pro have the edge tone wise because of the additional tubes on the drivers? Any advice would be great. I don't have a way right now to A/B them very easily that I'm aware of. Also, I'm at work right now and can't play through them...and I'm a little eager to see what all of you have to say about my plight on which one to get rid of.