If it's in your budget, I'd recommend you get the preamp. I love the buffer GP w/volume contol but some prefer more gain. 2 volts gives lots of dynamic output, and the buffer does not get congested when played loudly. I'm sure it's the same with the battery preamps. And, big soundstage, too. You're on the right track.
The Dodd stuff will mop the floor with standard SS preamps.
