Carvin make some really nice kit however it is a good idea to also look at a few competitors as well as Carvin prices are sometimes a little hi.

Marshals are also nice and, if you pick carefully pretty versatile. I have 4 at the moment from a little 1w mini marshals that runs on a 9v battery, a lead 50, an MG15 MSII and a TSL100 / 4 x 12 monster.

All are good in there own way though the TSL is my favorite !