First off, I'll openly admit I have no issues with moderation and enforcers of rules, but I will also admit that tooki likes to use his powers a bit more freely than other admins, if you catch my drift.
But to the topic, for the most part, these are the same systems you could've purchased before the FW800 models except it's got a single 1.25Ghz CPU instead of the prior CPU choices.
The extra L3 cache will prove worthy to have in some intensive apps, and relatively unimportant in others...there's so many more important aspects than this, such as your amount of RAM and so forth...I wouldn't really consider this a selling point either way.
As for the fan, I'd also guess Apple kept it "quieter" like the FW800 models...if they didn't, complaints will surely start pouring in again, which wouldn't be good for Apple.
Personally, I'd take a gander at all the refurb/leftovers/closeout FW800 machines now surfacing at online Mac resellers as they will probably yeild the lowest price. Be sure to keep an eye on
www.dealsontheweb.com and
www.dealmac.com for your best price on closeout G4 PowerMacs.
