The reason the Carvin price is, as you say, an "eye catcher" is because they seem to leave one aspect of their products compromised, IME. For instance, with their basses, it's the pickups, with their amps, it's the speakers, that get shortchanged. Still, they are a very good value.
The R series heads are a great buy. Incredible flexibility, very good reliablility, latest technology, no plastic knobs, features galore.
The cabs are built first rate - thick birch plywood, tough-as-nails covering instead of Tolex, strong steel grilles. But they do "goosey" things like making their 4x10 an 8 ohm cab instead of a 4 ohm which would draw more power. Better Eminence speakers or the option to have them installed would be a big plus. Those that they use get the job done for me, but they're what keeps their cabs from being taken seriously by sound connoisseurs.