Ok, time to go... Had a SD 18 and loved it, just not enough juice or lowend. So, have always thought about snagging a 45, but nwo cosidering a 30 fo rthe smoother cleans. With these two, basiclaly just use my knowledge of the different tubes? 84's vs 66's? Or? I know the 45 is voiced more MArshally, but in the cleans as well?