Ive been playing a littlemark ii and the ny 121 cab for the past couple of years. Recently (about 4 months ago) picked up a well used gk mb150e combo. I have been using it for its portability and ease of use here as all my gigs are done using public transport (subways busses etc). I love the tone of the gk combo and am thinking about something with a bit more watts for a certain gig. Would the gk folks recommend the gk mb 200 or the 500. Since I wont carry a lot (so probably a 15 cab is out of the question) , is a new gk head with my 121 cab the way to go? I play weekly jazz gig and a little bit of fusion jazz ,and do a pop gig a few times a month as well (without drummer in the pop gig). Have loved the tone of ampeg and gk in the past. Any advice for this straphanger . Finally from time to time I bring out the dawghaus so need something that sounds good on both. thanks in advance!