Can't help on the antenna but I'm trying to put together a sub and bookshelves as I believe this will give you the best bang for the buck. I looked at av123 and most of their speakers in your price range are back ordered. I then looked at Axiom and their cheapest sub is $470 for a single 8". For $30.00 more you can have a more powerful 10" from Aperion Audio. Let me piece this together.
Aperion Audio Intimus 532-LR Bookshelf Speaker - $360 a pair
http://www.aperionaudio.com/product/Intimus-532-LR-Bookshelf-Speaker,5,20,5.aspx
Aperion Audio Intimus S-10, 10" Powered Subwoofer - $499.00
http://www.aperionaudio.com/product/Intimus-S-10-10-Powered-Subwoofer,19,32,47.aspx
I know were over budget here, but this speaker system will sound exceptional. Let's try this with Aperion's 8" with a passive radiator.
Aperion Audio Intimus S8-APR, 8" Powered Subwoofer - $399.00
http://www.aperionaudio.com/product/Intimus-S8-APR-8-Powered-Subwoofer,18,32,33.aspx
OK, here's the GOOD news. I'm an Aperion Audio owner, and they give you 30 days to audition their speakers in your home. Many do, but most don't pay shipping both ways if you don't like them. Aperion does! Here is the GREAT news. If you keep all original packaging Aperion will give you 100% back to Trade in / Trade up to a larger system. And they use 1" HDF for construction, not 1/2" or 3/4" MDF like many companies. Two finishes are available, Cherry and Piano Gloss Black. I have their largest Towers in Piano Black, and they look so sweet! And they sound GREAT!
I suggest the S8-APR sub for $400.00, and the 532 LR Bookshelves for $360.00. If the S8-APR sub isn't enough bass, you can trade up to the S-10 for $100.00 more.
OK, $760.00 for a great Sub/Bookshelf combo. Back to electronics.
Yamaha RX-V459 Black Receiver - 167.97
http://www.onecall.com/ProductDetails.aspx?id=87430
Onkyo DX-C390 6 Disc CD Changer - $149.00
http://www.onecall.com/ProductDetails.aspx?id=21714#
OK, lets see, $1077 shipped to your door, and the sound will make Daddy's office off limits to any children! Sorry I went over by $77.00 but there is no tax on the speakers, and probably not on the electronics either. Compare that to Best Buy, or Circuit City!
Hope this helps
!