I'm amazed by the whole idea of design and Apple, specifically that all Apple design is great and all Dell is bad. I agree: my Dell is not gorgeous, but it sure looks good. I find it amazing that the people on these forums find it impossible to compromise on the looks of their computers. Is it the same with every product? If these people were so uncompromising in the design of their lifestyles, they could easily spend vast fortunes on furniture by designers and clothing. While I myself am a huge style fanatic and very carefully craft the layout of all my living areas I also have Ikea furniture: because it's cheap. It's not made as well, it doesn't last as long and it doesn't look as nice (although it does look cool) but you can't beat the price for that style and convenience. This is how I feel about Dell.
I hate using the sprawling Dell website as much as I hate going to the sprawling Ikea superstore, but I do it. Not because I couldn't afford better, but because I don't see the need to always do it.
I have seen so many ugly mac setups in my time (wires everywhere, monitors on angles, the whole deal) that comparing an ugly Apple setup with a very neat *mixed* setup is a no:brainer. It's all in the way the components are arranged for practicality and aesthetics, not in the perfect look of each product.
Go with the Dell, you'll be happy with it.