Ant, Regarding the issue with volume and the neighbors. You either need a small vocal booth enclosure like sah5150 has for his 4x12..... about $800, kind of expensive but it SOLVES the problem you and I have, or you can build a ghetto cab soundproofing thing like I built.
Buy an Auralex amp isolator stand which lifts your cab off the ground about 3 inches and that 3 inches is filled with Auralex foam, isolating your cab from the ground and hugely reducing the amount of low end that travels through the floor and out the walls annoying the neighbors. Then I bought a fairly thick, padded gig bag for a 4x12 cabinet. I cut a hole where the speaker I mic is. The other three speakers are blasting into a padded gig bag, greatly reducing their volume. Then I built a 2x4 framework around the cab and drape 6 layers of thick moving blankets from the floor to over the top of the cab over the 2x4 framework. It is all inside a walk in closet. It is surprisingly quiet. I've lived here 4 years and none of my neighbors have ever even commented on the "noise". You can barely, BARELY hear it on the sidewalk in front. I could probably play with my 100w Marshall cranked on 10 and Hot Plated only down -8db until midnight if my kids weren't sleeping in the next room. As it is, I have cranked up after the kids went to sleep and they didn't wake up! All in all I spent less than $200.
thanks for listening