I currently use a pair of CJ Premiere 12 which I love. However I am looking to add an amp to my stable. I am considering Class D or some other variant but the amp must be fairly lightweight (30 lbs?) as I have had back surgeries and I would like it to run cool. NY summers are brutal with tube amps. I know there are quite a few brands out there but how to know which are good and which are posers? Theres NORD, Appolon, VTV, AGD, LSA, Merrill, Atmasphere, Rowland, NAD, Benchmark etc. I am not looking for squeaky clean scrubbed sound as you can tell from my CJ's. I would like150 watts (my DIY speakers are 88db) and I use a Rogue RP7 Pre. I'll consider and actually prefer preowned and my budget is $5k (flexible). Thanks for your advice...