I have an early model (1996) EVH 5150 head (which sounds great) that was my main for years, but I got a Friedman BE100 head about 3 years ago. It’s amazing. I run it into my Marshall 4x12, the tone is literally the best sounding hot-rodded Marshall Plexi tone I’ve ever heard. It’s the centerpiece of my live rig pretty much forever from here on out!! 
Back in the 80s I had two heads - a late seventies Marshall Plexi and a JCM800, and I had both of them modded with an extra gain stage by a local Long Island guy who did an amazing job. In the style of the Lee Jackson mods that were so popular back then. But I sold them off years ago, so when I heard the Friedman and finally played thru one at my local shop, I was sold.
Prior to that I was considering a Boogie Triple Rectifier, I have loved the tone of that head for years. But once I heard the Friedman and played through it, that was that. Actually have a short clip from the first time I tried it.
Even with the shitty phone mic, you can hear what amazing tone it has! Straight into the head, no effects.