I'm shopping for a new rig. I have $2,000. I want either a tube preamp-->power amp-->4 10, or a head with tube pre to a 4 10. I have an SWR combo now and love the hi-fi clean sound. However, like when I buy a new car, I want to try a different flavor amp.....but similar sound (i guess the car is a bad analogy). I plan on carting my bass around and test driving rigs like mad for the next month or so, but can anyone offer suggestions to help me narrow down the search?