Thanks everyone! I have been looking for a forum that was full of people passionate about audio, and that didn't mind helping w/o belittling peoples ideas. From everything I have read, it appears I have found it here.
I look forward to learning from your collective expertise.
Enclosure: I plan on 4 individual slot ported enclosures under the tv. The enclosures will be 20"(W)x 28"(H)x 25"(D) with a countersunk double baffle. Internal cf before port and driver displacement is 6.45cf. I am still deciding on the tune. I am a little stuck there and need to decide between 17Hz and 20 Hz. I am leaning toward the 20 Hz tune as I listen to a lot of music in comparison to movies. The length of the port tuned to 20Hz is 2x 9"(W)x 3"(H)x 52.2"(L) ~.5cf. The driver displacement is .24cf. Net after port and driver displacement would be 5.71cf. I am not sure if I am going to use dowels or scrap MDF for bracing so I will refrain from trying to estimate the volume they will use. This is as large (W) as I can go and still have room for my mains, which are yet another project in my book. I can increase the height to 30" and increase the gross internal cf to 6.63cf but I don't think there will be any discernible increase in output and would cause the tops of the enclosures to block too much of the windows. I was given clearance to do so, however I don't want to push my luck. smile.gif
Power: As soon as my project funds are replenished I plan on buying the iNuke6000DSP. I chose this option due to the built in DSP and power output. I will be ordering and replacing the stock fans at that time.
AVR: Yamaha RX-V2400. I have considered upgrading this unit, but the budget just isn't there this year. Until then, this will be the AVR.
Sources: PS3 for movies (both DVD and BR) and games. My laptop to stream Pandora and my mp3 collection. and finally the Direct TV HD receiver.
Edit: I keep going back and forth on the enclosure size and tune. One day I want to do 17Hz and the next 20. I will likely go as low as I can without giving up too much space. Looking at increasing the height now to accommodate the 70"+ port length and 17Hz tune. My time is at a premium right now. What I manage to get done is in intermittent chucks of time.