Preamp with phase invert and balanced out???

Trying to decide what route to go. I have not been in the hobby for awhile and sold my previous rig when I went to finish my Graduates. Out of all the components I had kept my modified bolder Squeezebox 2 which sounded fantastic in hopes to use it in the future. Although I am trying to sell it and am considering keeping it but in order to use it on the Quad 12L speakers I plan to get I need to correct the phase that is reversed due to the modifications. This was not a problem in my previous system because all I did was switch the speaker cables but that is not an option now. Here are the different routes I am considering.

Option 1:
Keep the SB2 and just get a preamp that have a phase inverter switch. I like this option because it would allow me to get a fairly well priced pre and I can save up move for a good dac.

Option 2:
Skip the pre and get a dac with a built in one. I find this one harder to find and they are just usually more expensive.

What route would you do? For those who think the preamps the way to go, are there any good one out there for under 400 that have balanced outputs and a phase inverter switch?