I'm thinking about building a 5E3 from scratch, and I had a thought from something I saw in another forum. If I remember correctly, low ESR filter caps help give the amp more snap. Are PolyProp caps low ESR? And if I wanted snap from the amp, would useing big Solen PolyProp caps as filter caps help any? They are only a few $$ more then Electrolytics, and I think I'd only have to deal with their size as an issue. Edumakate me some on if this would work and have the results I'm thinking they would, please!