Why knock Dell?
I'm no Apple fanbois and currently own two top end iMac 27in i7 2011 models - first, upon delivery of both models in June last year, both were sent back for yellow screen issues, of the replacements, I'm now in the process of swapping out LCD monitor for one - its not even 11 months old.
Apart from the useless GPU, this looks good to me and just remember Dell offer 5 Year warranty - Apple only three with AppleCare - all my post October 2009 revisions iMacs have been in for repair, usually its LCD monitor issues.
So, whilst I like Apple design, I'm afraid to say quality is another matter, particularly each time I need a repair it costs me money by taking time off work and travel expenses.
Remember, we pay a 20% premium just to have a Apple logo - if another vendor could offer a similar spec 27in/30in model that could utilise hackintosh with a five year warranty, I'd be tempted!