having played both of these heads this past weekend at gc i have caught the gk fever...i played both of these heads through a gk 410sbx cab and loved the sound. the 700rb seemed to have a bit more low end than the 400rb, i set both eqs flat at first and adjusted to my taste but couldn't get the xtra bottom from the 400rb. could the 700rb extra bottom end be attributed to the more headroom it provides with more watts? i currently run an ashdown mag300 into a dr bass rx212. do you guys think that the 212 would make up for the extra lows lacking from the 400rb? i don't really see myself ever needing the 480 watts from the 700rb. i currently just jam with one of my friends who has a 60watt 212 fender combo. we mostly play indie rockish folky music where nothing is really cranked to ear peircing volumes. i've been planning to get a 115 cab in the future as well(preferrably bag end) and have always loved the sound of a 400rb into a 15. i'll probably be pulling the trigger on one of these heads soon and putting the ashdown on the chopping block-what would you guys recommend the 400rb or 700rb?