"suspect you know waaaayyyy more than me though!"
:)
Please don't count on it. I may have a few iMac G5 systems (and 10.6.8 is the latest installed version) plus an eMac or two, an iMac G4 (the one with the screen at the end of a pole from a base shaped as a hemisphere) and an iMac G3, but I really am not a massive fan of Apple and have never bought anything at the "new" price, have no iPad or iPod or iPhone (and while it might be nice to do so, feel no need for any of them, as I have adequate Archos tablet, MP3 player, and several Android phones).
Someone is going to wonder "WTF does he have several iMac systems if he's not a fan of Apple ?" and the answer is that they're handy as they have a version of Unix sitting inside, and it is easier to use one of these without needing to 'sacrifice' a working Windows XP system (ie one of those I know well, and am extremely comfortable with, have utilities and applications for and will keep going until I stop breathing, with a little luck!)
I'm only familiar with a few of the changes over the years in the Apple Mac world, and limitations (such as the Chrome browser only running on the Intel powered G5 iMac, various bits of software not being compatible with 10.4.x or 10.3.x, etc, etc).
All in all, just as I've been less than impressed by Windows 8, Windows 7 and Windows Vista, I might simply be more comfortable with kit I have used in the earlier 25 years of my career (up to 2003/4), and not the very latest operating systems!
When I asked, it was genuinely to see if there was really a good reason to upgrade to a newer version (bearing in mind this machine was only 150 quid when bought Nth-hand - no knowledge if it was secondhand, third hand, etc!)