Hi Everyone. I'm currently using an AC30 and I want to move towards a smaller wattage head/box combination for live and recording. The sorts of things I've been considering from far away are 65 Amps and Divided by 13. Looking at the smaller of the %13 amps can anyone fill me in on the key differences between the SJT10/20 and JRT9/15 in terms of tone and volume. I'm leaning towards the EL84/6V6 equiped JRT15 but I'm interested to hear comments.