Re: randall rd100 vs eganter vengeance vs peavey 6505+
Out of the 3, I like the Egnater Vengeance the most, and I have one sitting next to my Bogner XTC, Jubilee, JCM 800, Orange etc.
It's a very well thought out amp, and has features you appreciate more once you own it.
The gain channel can be tight 80's, sludgy doom, mid-heavy, scooped, whatever you want.
It also has dual footswitchable masters, so your boost has it's own volume control. Both channels have their own reverb control, which is also footswitchable. It has footswitchable mid boost, and footswitchable FX loop. The FX loop is fully mixable like a Bogner.
The Vengeance can also take any octal tube type, and you can even mix duets of different types, and bias them individually with a volt meter.
As for the clean channel. It's one of the best clean channels I've ever heard on a two channel high gain head. It's in the same quality ballpark as my Matchless and vintage Fender Pro Reverb.
I can't say that about any Randall or Peavey I've plugged into. I'm not sure how long the Armageddon and Vengeance will be around. They could be discontinued at any time, so track one down. There's not many amps in their price range that are better.