The Marshall MG amps are made in Korea and not the UK plant.
Behringer has a new plant in China called Behringer City which should improve their quality.
We have the following combos (with mods) in our test room and or setup benches:
Marshall AVT20 - modified power supply, updated opamps, converted to open back and speaker swapped - good amp.
Marshall AVT275 - totally unhappy with. Speakers are good but preamp has no character.
Marshall Lead 15 Micro stack - speaker swap - ok amp.
Marshall DSL401 - no mods, good amp. These have gone up in price considerably in the last few years.
Peavey Bravo 112 - updated opamps, speaker swap - excellent tube amp and we suspect its reincarnated in the Valveking.
Peavey Studio Chorus 210 - modified power supply, updated opamps, modified distortion circuit, speaker swap - now a very loud 210, good amp.
Peavey Audition Chorus - no mods, good bench amp.
Peavey Backstage Chorus 208 - no mods, another bench amp.
Behringer GMX210 - speaker swap, asthetic mods - good amp.