OSX is extremely simple on the surface... which is one of the reasons my family all use Macs now (I haven't gotten nearly any "my computer isn't working" calls since), but if you need serious power it is a full certified UNIX under the hood, bringing with it all the goodies you would expect (and more). I'd agree with Baldeagle... to me it is the best of both worlds... because it can do both the mundane browsing/reading e-mail, etc. work, and then turn around and let me write POSIX compliant software, use DTrace, troubleshoot network issues with UNIX's superior toolset etc... and to be honest I spend 10 hours a day at work fixing other peoples servers/software... so I just want something that works without any hassles when its my personal time.
Of course those are my needs, not yours... so you just have to choose what will meet your needs best. That said, keep in mind "Macs" can also run Windows if you feel so inclined, whereas PC's cannot (at least not legally).
As for price...I feel Apple is reasonably priced in the laptop segment (some will strongly disagree with me here), but their desktops are far too overpriced in my opinion...
Of course after I said all that, and I'm posting this message from my Windows HTPC... because its connected to the big screen (tired of staring at a laptop screen all day)...
