HDMI cable length...how long is too long ?

Thank you for the info .

It appears that a good quality HDMI cable may suffice for the distance that I need .
Given the above info...I would like to know the opinion of using a 25' to 30' cable with wall plates . Will the wall plates and additional short HDMI cables on each end denegrate the signal . Will this set up suffice for 1080p
and 3D ?
Lastly , the Bluejean Series 1 cables have been recommended , these run in the low $100 range . Is there a better cable for less than $200 ?

Thank you

MonoPrice.com sells their Redmere HDMI cables that are specifically for longer runs, 25+ ft. I have heard nothing but good things about these cables and I recommend them for longer runs. A 50 ft. Redmere cable will cost you about $68 + shipping...

http://www.monoprice.com/products/search.asp?keyword=redmere

-RW-

But even with those cables, I don't recommend using HDMI cable from AVR to wall panel -> HDMI to second wall panel -> HDMI cable to projector

Ok... would cat5 work better with the wall plates ?
How futureproof is the Cat5 set up ?

internetmin said it best.

Run MANY cables

Each HDMI cable should be one long cable not going through intermediate wall plates. Two or more.

Run 2 or more Cat6E with wall panels

Run run through wires that allow you to pull new wires through the walls should the need arise.