Pream question

The easiest way to do this, is to listen to all 3 and pick the one that sounds the best.

Sorry, but you did say the preamps were in your local market. I thought that meant you had access to them. If I had to buy blind, the BAT is probably the safest choice. I had the LS25 and its not the best match for your tweeter. The BAT has a nicer top end and the build quality is much better. But you're still taking a chance. You should try to listen to it first, if you can.

I think you'll be very happy with it. It sounds great and the build quality is outstanding.

How do you know that the caps are the problem? I know that I recommended the Bat, but sometimes things don't work out. I was kind of surprised that it didn't sound good for you. The last thing I would recommend for you to do is put money into an expensive preamp that you've never heard sounding good. There's other choices, and not only that, you really don't know if there is anything wrong with it.

That said, if you want to look into Caps, I would contact Bat. They're known for offering Cap upgrades, and if you explain to them the problem, they may be able to give you some good advice. Bat does have a very good reputation. I don't think they would mislead you in any way just to sell a preamp.