I've been using my white early 2008 MacBook (32-bit) while holding out for the new iMac which I'm certain of getting. However, with Mountain Lion not supporting 32 bit systems and the new app updates in the Mac App Store often requiring something later than Snow Leopard, I'm forced to get a new MacBook.
Right now I have two choices: a $540 late 2008 aluminium MacBook or a $890 early 2011 MacBook Pro (both second hand and lowest tier, except the MacBook has recently gotten a new battery, 500GB hard disk, and 4GB of RAM).
For usage purposes, I only really need the souped-up 2008 MacBook, but the 2011 allows me to use AirPlay (which is something that I would use often if able to) and the sting of Apple discontinuing my existing MacBook is still hurting.
Would you recommend I stick with the cheaper, and probably more sensible option of getting the 2008 or should I stick with 2011 so I can stay on Apple's support radar for longer?

Right now I have two choices: a $540 late 2008 aluminium MacBook or a $890 early 2011 MacBook Pro (both second hand and lowest tier, except the MacBook has recently gotten a new battery, 500GB hard disk, and 4GB of RAM).
For usage purposes, I only really need the souped-up 2008 MacBook, but the 2011 allows me to use AirPlay (which is something that I would use often if able to) and the sting of Apple discontinuing my existing MacBook is still hurting.
Would you recommend I stick with the cheaper, and probably more sensible option of getting the 2008 or should I stick with 2011 so I can stay on Apple's support radar for longer?