Advice Please, New hardware: Low power and hi Def

[technoboy]

I am also looking for a CPU and to build a dedicated system. Low power consumption and the ability to work with Hi Def are prime considerations. I want to be able to record TWO hi Def channels and, if possible, watch one simultaneously.
I looked at the Jetway Mini-ITX board with a Via C3 processor. They make one with an HDMI socket on it.
Currently the J7F5M, on this link, has only the 1.5GHz CPU but I do know that there is a 2GHz CPU that would work in that board - though whether it is possible to buy the board with a 2GHz Via C7 I don't know.
C7 CPU: http://www.via.com.tw/en/products/proces...m/c7-m.jsp
Jetway ITX board: http://www.jetway.com.tw/jetway/productsearch.asp
Sold here: http://linitx.com/viewproduct.php?prodid=11725

That was one thought. The other was to use a motherboard that supported Intel core 2 duo Mobile CPUs.
Motherboard: http://tinyurl.com/32r6au
CPUs: http://www.cclonline.com/product-categor...ory_id=450
Though I wouldn't want to stretch to the expense of a 2.16GHz unless absolutely necessary but would go to the 1.83GHz if need be.

Please comment on the above and give any other advice. I do know that some programs won't run on AMD 64 (so I haven't checked AMD out so far).
As I have stated above, low power consumption is a must. For example, my AMD Athlon 64 2800+ 1.79GHz CPU computer runs at 70W/h. Over a year, running 24/7, that would cost me £61/year (~Euro90, ~Aus$150, ~US$120) in electricity charges.

[-stattik-]

Here's a great place to start:

http://www.avsforum.com/avs-vb/showthread.php?t=710828

I would look at a core duo. The 4300 on up should be able to handle HD and power consumption is low. Recording two HD shows while watching another shouldn't be difficult either.

[sub]

I'd also recommend the core duo or core duo 2 processors. You probably wont be able to do high def playback on those C7 processors.

You'll probably also find any onboard video is not up to the task for HDTV. You'd probably need to add a nvidia or ATI graphics card.