Having been a Mac man all my life I relished the opportunity recently to have a dual boot laptop on my macbook pro. Basically this means due to Apple investing in Intel dual processor chips you can run windows natively on a Mac. This means I can run all of the games and pc based apps on XP, and then restart my laptop and then run all of the lifestyle apps like itunes and surf the net in safety in Mac OS. I love having that the best of both worlds, and if any of you are thinking of going over to Mac then this is a great way to have your cake and eat it :)
As for the machine itself, its very well made with a high speed processor and good graphics card, the build quality is second to none and actually the prices on most Apples is relatively comparable to simular spec'd well built PCs like Sony Viao, or Dell XPS. I've always considered that they are worth the money I have paid for them, good things are well worth shedding a extra few pounds to buy, after all you can't take it with you when you go so you may as well enjoy it while your here :P
Hope that helps.