Mesa amps are the FUCKING BOLLOCKS, but very VERY expensive - even the "cheap" ones are fucking dear! But they do make some of the best valve amps you will ever hear! The 2x12" combo Rectifier "Rect-O-Verb" series are just fucking insane - for a 50w amp they outperform most 150-200w amps!

I have a little 30w Marshall, 1x10" solid state "Valvestate" emulating amp, which is okay but the distortion/gain on it is horrible so I got a Line6 Tone Core pedal for it which makes it bearable. Marshall amps are great, but their biggest problem is lack of low end. Even with a 2x12" valve driven amp, they just have no bottom end at all and on their won sound incredibly tinny...

I did borrow an older 1x12" Valvestate2000 AVT50 from a friend, which had a lower ohmage driver in it which helped with giving it some low end beef, but still, it's no match for a Mesa...

Line6 amps are very cool for the bedroom player - loads of funky and cool effects, but I dislike them on principal due to the 100% digital nature of them - they just aren't clean and pure enough really... But they are fun to fuck around with - was playing with one in my mates shop a while back - stuck the delay and reverb on full, put an INSANE ammount of gain on it and pulled some wicked harmonic dropbombs and pullups from it

Likewise, for solidstate crunch and sheer "scream", Randall amps have it covered, but have to be solidstate and not valve driven. Think Dimebag Darrell style - he used solidstate Randall's - and you get those awesome highpitched super-gain screams!

As for weight - most Mesa's outweigh Marshall equivelents - the 2x12" Rectifier combo comes with wheels on it as standard FFS Heavy heavy amps, but totally worth it!