I have the AX2 combo and it's great, maybe it's not "as" warm as tubes, but, all the effects and tweakability are a major plus for creativity... Also, the POD's a great tool as well...

As soon as I save up the cash I'm going with the Vetta HD and Full stack... I played around on a Vetta combo and I fell in love with the near limitless possibilities it has...and the displays and back lit buttons look Bad ***...