ThinkPad vs. Apple – Which One?

I have narrowed down the possibilities for my new computer — either a Lenovo ThinkPad T510 or a 15″ MacBook Pro. Given that I will still need to buy and install Parallels and Windows for some Windows-only applications I need (MAXQDA, SnagIt, Outlook 2010, EndNote, etc.) and the fact that the Mac is almost 2x the price of the Lenovo (which has a faster processor and more memory), I am leaning toward the Lenovo.

Is there anything I am overlooking that should make me again consider the Mac?