John, yes and no. First, thank you for your acknowledgement. I have benefited so much from the generosity of the online community. I am truly grateful that I can give back. So... this is the best answer I can give:
http://www.gearslutz.com/board/music-computers/371545-logic-pro-multicore-benchm arktest.html
Now this is comparing cpu's for the purpose of audio editing in Logic Pro but I think that logic is a good indicator considering the relevant similarities tween audio and video. I can also tell you that these numbers are spot on. (I own a MacBook Pro 1ghz G4, Mini core duo 2.2, mini server 2.0 i7, and an iMac 2.8 duo extreme, in addition to 3 - 2.0ghz pwrPC duo G4 MacPro’s and these numbers are tested and true. (I own a business that requires such a collection)
Logic does not bottleneck in RAM, it bottlenecks at cpu and at data transfer rates. GPU power is irrelevant. Processor speed, hd speed, and external drive speed are key for audio engineers. A 256mg solid state and a raid zero external firewire are the bomb for audio engineers. Let’s move on…
Logic plugins are processor intensive. Yes, East West Samples and Studio drummer will eat your ram like cookie monster eats thin-mints on weed but…FCPX eats ram like a zombie at a petting zoo. Ok that image didn’t work. FCPX=ram consumption on an absolutely mind-boggling level. I have never, in 15 years of audio/video engineering seen a more gpu/ram hungry program. Never. iMacs and MacMini’s are two generations from being tolerable with 64bit video editing tech. Seriously. FCPX is minimum 2 generations early from a hardware standpoint. This is a new era for apple.
Logic screams on my mini server. FCPX does not. Rendering in fcpx does not, based on my experience, take advantage of multiple cores to the extent that real-time-audio-effects-processing does. Downloading, uploading, and rendering seem to bottleneck at RAM. So, the iMac and the MacPro both offer higher ram possibilities, as does (I believe) the dual cpu spec’d minis.
When rendering, virtual cores do nothing and my 8gb of ram is absolutely maxed. So, higher ghz processor, larger fsb, and more max ram should give better results with FCPX than does multiple cores.
The plus side of a mini…I have one monitor at work and one at home. I also have an extra keyboard and mouse and I carry my mini like I would a laptop. Why didn’t I buy a laptop? Uh…duh…1,000$ difference in price! And I don’t move my cpu often. If you are only doing video, look into a the 21” imac upgraded with the 2.7 i7 and 16 gb ram from Crucial. Funk Apple’s overpriced Samsung ram. Buy an extra Logitech wireless keyboard and a magic mouse and the imac goes in a back seat or a trunk like butter. Based on my experience, the 24"imac upgraded to 2.8 ghz i7 should smoke my mini. I would make that purchase if I wasn’t working mostly on audio. I have so many plugins and such that I really need the second drive for back-up and optimum hardware utilization for audio. And, the iMac can not beat my mini for my aplication. And...hdmi output. Hello netflix!
Conclusion. MacMini Server…best mac deal available right now (sub 1grand). My assumption based on usage is that the 21”imac with i7 upgrade and maxed ram would be a less portable but much more powerful video machine. It also costs 1200.00 more than the mini server so there you go.
Get the mini and buy a thousand dollars worth of lenses or mic preamps. Processing power is nothing without creativity.
To see what I've done with my Cannon T1i and MacMini Server, check this out: http://www.youtube.com/watch?v=BR6Wrxzch8A