Nah, I have a Mark 5:25, the little one:
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But I have been talking myself out of the Petrucci head ever since they were released. It's the most phenomenally great-sounding and versatile amp I have ever plugged into. However, I will say that the Mk IIC+ and Mk 4 modes of the 25 are so close it probably makes no difference in the end. No more than the difference from one guitar to the next...it's just that the engine room in the JP will move a mountain while the 25 is loud enough but lacks that kind of brute force behind it, if you know what I mean.
That "little one" looks formidable! Like a Mark 1!