How do towers compare to bookshelf speakers? Right now I have r/c/l and a large powered subwoofer. Was thinking of towers for L/R, not sure on center channel and sub isnt going anywhere. How could I set this up? Can I keep my 3 speaker set up now and just add 2 towers?
Basic rule of thumb on Towers -vs- Bookshelves is, if you're sitting more than 12-13' away from them, you probably want the extra output that most towers will give you.
But... That in no way means that you can't get towers, just because you "want" to, but less than that distance you probably just don't "need" them.
As far as upgrading, we just simply need more info to be very helpful.
What speakers you currently have?
What receiver?
What your goals are, for the upgrade?
Room size?
Dedicated room or living/great room?