A friend of mine recently bought a VOX modelling amp that gets great reviews, and I have to admit at home it sounded very good. Come band practice it couldn't compete with my valve amp even when I scaled the volume back to very low levels. No presence in a band situation whatsoever. Now, that's not necessarily a fault of the modelling preamp, but the fact is was paired with a solid state poweramp. Perhaps that is skewing this discussing somewhat - how can you objectively compare modelling at the preamp stage with any number of variables depending on the choice of power amp, and valve kit where the power amp is very much where the action is?