I bought a MK2 HD100 about two years ago. I love this amp. You can get any tone you can think of with it. It has all the effects in it also nothing else to buy, except the floor board to control it.
I went and saw D.R.I. live they were using a mesa boogie mark 3. It was so crunchy. I went and tried to find the tone with my mk2. It took me about thirty minutes to dial in the sound.