I highly suggest you visit an Apple store and talk with one of their staff before you rush into buying one. I switched back to Macs in 2007, and never looked back. I'd spent a lot of time with Microsoft as an MVP and been part of several of their large product beta programs. I started off on Macs in the early 80s but the change in 2007 was a challenge, as they do operate differently from a mental how to perspective.
If you are going to buy one, look at their Refurbs they offer. They come with the same warranty as a new one, but can shave 20% off the price or more. I bought my 2007 iMac on the refurb site, finally 2 months ago the power supply die, but had it replaced in a day and running great. One thing I like about my mac is it runs just as fast, if not faster now under Mavricks then it did when it was new. I can't say that about any of the 2007 Windows machines at work.