I work in IT and we buy only Dell laptops. I find the quality to be lacking in Dell computers, at least the Optiplex and Latitude models which I'm most familiar with. I could be wrong about the home models, but with what I've seen I'll be saving up for a Mac laptop. Sometimes you do get what you pay for.
I know this is an older thread but I had to comment on this. I do warranty work for Dell, HP, Lexmark, etc. I can say with 100% certanty that quality concernes about Dell have been fixed in the last year to year and a half. Simply put the number of failed systems with the new 1330's and 1530's has substantially dropped from prior generations of Inspiron, latitude, XPS's. On the Latitude line everything past the 620 line is really good hardware with one exception....they are using Alps instead of Synaptec touchpads which feel WAY more mushier to the touch when moving the cursor across the screen. Beyond quality the features simply blow the MBP out of the water. Some of the features like touch sensitive buttons instead of real buttons make the new xx30 series feel more innovative then the MacBook line of laptops. Internally. Well internally the design is gone from prior generations. Previously I could pull apart any Dell laptop because you seen one Dell you've seen them all. The xx30 series again is a vast departure. The internals. Hell you can upgrade the CPU on both models by removing the bottem cover. So now on these new systems you can upgrade the CPU, RAM, Hard drive to keep your system current. Also the overall design is much more geared towards getting heat the heck out of the case. Overall I would say internal design matches or in some cases exceeds Apple design. In short I'd bet a paycheck that Apple outsourced the design to someone else. These laptop's AREN't your traditional Dell design. Which is a good thing for Dell customers. A bad thing for me. I normally can replace a sysboard within 30 minutes on a laptop. These new systems....about an hour. Oh well.