It can be upgraded, Im not sure if i would bother
If you really want to upgrade , I would go for the 2101 or the 2101A (artist) they are hyped up gsp 21s with a bit warmer tone. I have to agree with Flair. its all up to your ear on them.
You can tweak them to hell and back and get some decent recording and live tones.
I've had the GSP21 legend for almost 10 years. its had faster switching, more presets and I believe more effects than the pro(but not sure) I loved that proccessor unfortunatly it died over the summer. To be honest the distortion sucked .. really bad, but the delay and reverbs were awsome.
To be honest though I would'nt buy one now used .. they are rather old, and the 2010 or 2101 are much better. I personaly bought a GNX4 as a replacement. awsome proccessor .
Well i have had the digitech pro, legend, valve effects and the 2112. The bottom line for all those units is the presets aren't gr8, but, you have to spend time with them and you can modify and use yuor own settings with good results.
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