Okay, I was looking on the HTadvice.com page and I stumbled across their suggestion of using cement blocks as speaker stands. Is this a good idea? How does it affect the sound of bookshelf speakers? I'm about to get started on my home theater system which includes Polk RTi28s or RTi25s for the front speakers, and I'm not going to have enough right away for a decent set of speaker stands, so I was wondering if this whole idea of cement blocks would work temporarily because they are inexpensive. Any suggestions on how to make this work? Thanks!