Hi Mark,
Here's my two pence worth mate:
Despite most things being rather expensive for apple systems and their peripherals I will never go back to PC's.
After owning PC based systems for seven years or so and spending countless hours trying to persuade them to do the task's they were supposed to be doing in the first place, I bought an intel imac in January 2005 and I have had an extremely reliable performance, the only time it has ever crashed was during the processing of 90GB worth of dv film.
Also, I have never had to invest in anti virus software, not once has my computertater come down with any virus of any kind.
There are a few things that will take a little getting used to but you'll be dandio in no time at all.
I'm quite sure there are many folk out there who use PC's and have no problems at all but after my own frustrating experiences, the gnashing of teeth and pulling of hair and wasted cash I'm not going to risk it.
My advice in buying one is buy big, don't buy the cheapest system if finances will allow it.
Also, don't buy the extra RAM from the apple store, it's obscenely expensive, I bought mine from crucial memory (
www.crucial.com) and saved a couple of hundred quid. It's easy to install, there is a small plate underneath the screen normally, just unscrew and replace the sticks. Make sure there is no risk of a static charge or else 'bad things' will happen.
The time is getting nearer for me to look at buying a faster system with a larger screen and that's not going to be cheap but at least I know that I will have reliability and excellent performance.
All in all, I couldn't recommend Imac more.
All the best and Merry Christmas.
T.