Agree on TTK. What he does is great but his playing is so bad you can't even concentrate on things like tone.
800€ is too much though. You can get a used Dual Rectifier for around 1200-1400€. And I don't think it's guaranteed that it'll sound the same. Randall Smith said that he has business secrets no one else knows. A few components that have to be the exactly same components by the same manufacturer in the same position in the chain which is extremely essential to the Mesa tone. I don't think Bugera have this intel.
i've seen triple recs go for $800 used, but just think about getting a bugera trirec for $4-500 used in a few years....that's when it starts to look good.