I've never liked the MG series, and I've heard a lot of other musicians complain about their sound quality and durability. I used an MG30 at home because my larger Peavey amp was too heavy to travel with on a bus but I absolutely hated the thing. Considering you're moving up from the Line 6 series I would highly recommend looking at getting a tube amp, or at the very least one of those hybrid tube/ solid states like the Vox Valvetronix if money is an issue.
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