Those wouldn't be much of an upgrade. The biggest improvement you would probably hear would be the deeper bass extension, but since you have a sub in the mix, that really won't make much of a difference. Also you may want to hit a local audio shop that carries Polk speakers for a quick listening test (bring your own tracks that feature low/mids/highs/full range). Personally, I've found the upper end of these speakers to be a bit on the harsh side, and fairly lifeless, particularly for things like symbal/highhat, solo electric guitar, and violin.
Another option would be to keep an eye out on audiogon.com for deals on higher end audio, where you'll see a large improvement. Occasionally, they will list book shelf speakers from KEF, Paradigm, and PSB that would be in your price range that would be a huge improvement over both Energy and Polk.
Another option would be to keep an eye out on audiogon.com for deals on higher end audio, where you'll see a large improvement. Occasionally, they will list book shelf speakers from KEF, Paradigm, and PSB that would be in your price range that would be a huge improvement over both Energy and Polk.
