When really a modded Marshall is so modded that it is no longer a Marshall...??
As far as I am concerned, SLO100, Ecstasy, Diezel, to mention a few, are all modded Marshalls... and with a bit of a Stretch... why not a the Rectifier-type amps??
When the Recto came out it was based on the early soldano (a modded marshall really) circuit to compete with marshalls and soldanos and bogner because their fender-based hi-gain boogies were too focused and narrow banded. The circuit, unlike the Marks post EQ saturation, is, sure enough, pre EQ saturation, as are Marshalls... Rectos sound to me like scooped mid gainier Marshalls....
In summary, everything is either modded fender or modded marshall....
Now, if you want that special marshall eq curve with those beautiful higher mids, that is recognizable from clean to crunch to high gain... I will vote for the Camerock or the Quick Mod GT.