Small, Quiet, Instant-on, PC for browsing and streaming

I have been looking at various streaming appliances (AppleTV, Roku, Boxee, WD TV Live, etc.). It seems like no one device has a good browser and access to different services (Netflix, Amazon Instant, Hulu Plus, Vudu, etc.) and reliable interface/operation.

Having used BluRay players will built-in apps, those are somewhat slow booting and getting apps going.

Other than cost, is there a reason to not attach a small, quiet, instant-on PC to a TV via HDMI for browsing and streaming? I’m not planning to store video files or much else on this PC, so don’t need much storage capacity other than for streaming.

Can anyone recommend such a PC that is pre-built?

Is just going to a browser and to the individual web sites a faster and more reliable way to access things than via apps on other streaming devices?

Is a PC with SSD, no fan, and fast OS available?

Also, I know this may be sacrilegious on this site, but my priority would be something that just works without a bunch of tinkering. I have done and enjoyed many hours of tinkering over the years - just want something that works relatively well out of the box this time.

Thank you
Edited by ddlv - 2/16/13 at 3:33pm

Anybody have experience with the Lenovo Q180, or the new Lenovo Q190?

How about the Acer Revo RL100?

Thank you for suggestions above. Will check out both.

NUC looks like a good option. Thank you. I'm surprised someone doesn't offer this ready to go with SSD, WiFi and OS. Here are a couple of links for reference:

http://www.silentpcreview.com/article1315-page6.html

http://www.amazon.com/Intel-Computing-Gigabit-i3-3217U-DC3217IYE/dp/B0093LINVK/ref=sr_1_1?s=electronics&ie=UTF8&qid=1361618016&sr=1-1&keywords=intel+nuc

Check out customer reviews on Amazon link for good info on function and what's needed to complete the box.