I am not sure if I should shell out a couple hundred dollars for proper stands or not. Right now my bookshelves sit atop two identical short bookcase type pieces. These are the kind you purchase for 60.00 at your local KMart, Target, etc.. and screw together in about 20 minutes and then throw CD's or books etc. in them. They are roughly 12 x 12 and filled with CD's right now so they are heavy. I'm also lucky in that the height works out so the tweeter is at ear level when I sit. Will I notice an improvement by going with proper speaker stands?