The whole point of Jeff saying he HAD G-K but now has MB implies he likes the stuff he has now better than what he gave up to get it. But just because people rave about a specific brand doesn't mean that a great head is going to sound good with every cab on the face of the planet. Everything plays a part in your tone. From strings to pups to how your head matches with your cab. There is more than one post on this thread that says the LMII doesn't pair well with the 4x10HLF, ... LISTEN TO THEM. Or even better, go down to a music store and try out a MB with a 4x10HLF, listen with your own ears and see what they are talking about. My best friend has a G-K 700rb-II, it is a great head but I don't know what it would sound like with a ported Ampeg 4x10, a couple of people have suggested Acoustic, and they are a real bang for the dollar you spend on them, I would look into one of these or see if you can find a used Ampeg head (MIA) IME Ampeg sounds great paired with Ampeg. In the end all that matters is that you are happy with your rig, try out everything you can, look at how much you can spend, and then choose what you want based on what sounds best to your ears. Cheers, and good luck with getting what you want.