DerrickN- Brian is correct, you will not find Behlen products (the maker of Solar-lux) at a generic hardware or giant hardware store. I am lucky and have a local specalty fine woodworking store close by called Colco. Their prices for Solar-Lux is actually cheaper than WoodCraft. Check your local...
For the A/V-1+, I would also go with the caps before the BH-5 IF you can only get one of the options. The A/V-1+ is so well braced already, the BH-5 is not as effective as it would be on a lesser braced cabinet. I am not saying that the BH-5 does not make an improvement, it does. And I think it...