HD Projector?

[inkmachine]

Hi folks,

I'm moving into a new home and I need to get a television.

I've been looking at HDTV's like the good ol plasma, lcd, led and dlp sets.

I have a very large wall that I would like to get a large tv set for, but the more I've been reading, the more it sounds like a projector would give me the best bang for my buck. This would be going in a room that is 20' x 17'. There are 3 large windows in this room so there is a ton of natural lighting during the day (I'm considering getting black out shades/blinds for this room)

I have never owned or even viewed a projector in action, but I'm reading rave reviews all over for this projector.

Optoma HD20 Home Theater Projector
http://www.buydig.com/shop/product.aspx?sku=OPHD20

Using this projector calculator, it appears that I would be able to get a 110" across or 126" diagonal viewing area with the projector at about 9' away from the wall.
http://www.projectorcentral.com/Opto...pare_list=5039

So, my question to all of you is this....

Who has experience with this? Are there any hidden costs involved with these or maintenance costs that I am not aware of? Is installation something that I could do or should will I need to hire a professional? Is there much of a difference in floor or ceiling mounted?

Thanks for all of your help!
Jason