PSU's, Processorsand the whole 9 Yards

[ses]

I thought I would put together a recording computer for the livingroom with an old 2.2 Celeron. I have a 2.8 Pentium for my workroom where I do most of my video editing. It seems unnecessary to have a high power rig that only does recording and playback. Would the Celeron be enough for that?
Has anyone tried the "Be Quiet Blackline" PSU. It's much more expensive then the "average" PSU, is it worth it in terms of quiet. What other PSU's would be worth considering.
Then the question of a mainboad that really is well suited to video work is still another question that I have.
I record with iuVCR, do some editing work with Virtual Dub, then compress with TMPG.
Iam getting very good results from TV recording with an MSI FX5200 Personnal Cinema card when I use iuVCR.

[theReal]

For a long time I have used an Athlon 1.4GHz for recording and playback of tv - so the 2.2GHz Celeron should be more than enough (as long as you're talking about SD, not HD)

It's much more expensive then the "average" PSU,If by "average" you mean "no-name" then I'd say, don't buy "average"! Get a good, brand-name PSU like Antec or Enermax - best read some hardware forums for reviews before you buy one. It's important that the PSU is quiet, but it's even more important that it delivers good, clean current and stable voltage. I think Be Quiet is also a good quality brand (plus it's supposed to be extra quiet) but I can't tell you for sure, I never had one.
By the way you can always make another PSU more quiet if you don't mind modding it (adding other fans etc.)

[ses]

Thanks for the response, I'll check those PSU's out as well. I have an Aopen PSU in my 2.8 computer and it is rather quiet. I have a Thermalrite heatsink with a Zalmon fan. I only hear the computer if there is no background music in a film. If there is only a dialogue with no extra noise in the background, or music, I can hear the computer softly, it's almost as quiet as a VCR. Would sound insulation panels on the inside help much?
Forgive my ignorence but SD and HD means what?

[theReal]

SD = "Standard Definition" = normal, old tv standard with 768x576 pixels (PAL)
HD = "High Definition" = anything above that (like 1080i or higher)

About cooling and quietness... there's always the question how quiet does it have to be and how hot do you want it to be?
I have a watercooling system for CPU and northbridge (I'm adding a cooling block for the GPU soon) but my system still has two intake and two outtake fans, all of which are very quiet Pabst NGML fans, to keep everything as cool as possible. The loudest fan in my system is probably still the PSU fan, a 80mm Noiseblocker fan connected to the PSU's temperature-controlled power connector (it's running at 80-90% speed mostly).

My PSU is a Leadman Powmax 400W which originally had 2 fans, one on the inside, one on the outside - I removed the one on the outside and replaced the other one with the stronger Noiseblocker fan. Still, I'm thinking about replacing that fan with a 120mm one (if possible...). Larger fans are always more quiet. Also only one fan on the inside of the PSU is much quieter than two fans (AFAIK Be Quiet also uses that factor to make their PSUs more quiet)

Insulation panels can help to quiet down noise from inside the case, but they also heat up the inside and they don't help much with the noise of the out-blowing fans (I don't use any insulation because of that). However if you are using a cheap case that makes a lot of rattling noises then insulation is very recommended (I insulated my dad's cheap pc case with some cork-rubber panels and it helped a lot).

As you can see there's a lot to say about cooling and noise... I'm always consulting the PC Perspective forums (http://forums.pcper.com/) for deeper insights into that matter. My PSU is a few years old, I don't know if Leadman is still making good PSU's - if I'd want a new PSU then I'd consult these forums to make a decision.