Howdy Chris and welcome to the forum!!
I am biased since I own several HD1000s. As far as a high WAF, the HD1000 fits the bill IMHO. My wife and I use ours all the time, and almost every weekend. We have a harmony remote as well, which makes the task easier, but I am sure if WAF is something that you have to contend with, then you probably already have a Harmony or something like it. My wife and I both find it easy to use.
In the native form, I want to say it will play MP3, WAV and AIFF.
However, there are also third party made codecs that will work (thanks for Soiaf (that is his user name on the forum)), like WMA, FLAC, AAC lossless and others.
We love the use of the card reader on the front of the unit for viewing photos right from our camera. We also use SlimRoku all the time to play music ( http://www.permanence.com/SlimRoku/
). Since it can mount our PC's hard drive, we often play musci with SlimRoku and watch a slide show of our pictures. We also like the internet radio too.
I would look for a REV-B unit so you will not need to run a "swap file", which ties up the CF slot. The REV-B has twice the memory of a REV-A.
There are some reliability issues that some of the untis have in reguards to the OEM power supply, that can be fixed and there are solutions for having them totaly re-worked as well.
What questions do you have?
The "new" beta firmware is pretty darn stable, we run 2.0.35 and some run 2.0.36; if you do get a lock up, all you have to do is hold the power button down for 5 seconds and it re-boots. We hardly ever have to do that. Now that its retired, the beta is the newest current firmware.
I would say the HD1000 is a great place to cut ones teeth on media servers and clients!!
It has one flower of a scaler and the picture quailty is great. I think it was a tad before its time and perhaps why its now retired. If it came out today, with HDMI and some other small upgrades, it would be a very hard act to beat. Even now, its still one of the best IMHO.
Hope this helps, Matt
Roku3 and Roku HD1000 [Rev B] on a Samsung HLP5674W DLP in the living room; a Roku2 and two Roku XS and a few SoundBridges.Win7; Kubuntu and XP via RT-N66U, E2000 and a switch or two. I own stock in Roku, it's just all in the form of hardware.Viva la Roku