The conflicts with macs updating every year just means you normaly have to wait until 10.x.2 for drivers and stability… Not a bother and you are getting lots of great new features.
Both sysrems once you are in the daw are basicly indistinguishable.
However, macs for general operation like file management, contacts, emails, itunes, photos etc. makes windows feel very last gen.
SSDs can be used i a couple of different ways… you can use them as your main drive or having the caching files.
both give similar speed improvements.
the difficulty with the caching option is if you have a major crash you can lose data.
if you use them as a standard drive they are great but the cost per GB is still very high.
The Apple update issue isnt a problem… you just dont update until its sorted… even if you are running one version behind its still better than windows.
I only recently updated to Lion… had to wait for the Focusrite drivers… but its the same with most software really… only update when its 100% working for you.
On the whole virus threats on Macs are much less than on Windows, but it’s a good idea to run it anyway. I do. Norton Antivirus do a free, regularly updated antivirus for Mac that I run on my computer that works brilliantly.
i have a ssd in my mac, absolutely no probs at all, it is a notable improvement on a disk drive but if your on a budget i wouldnt worry to much-wish i had waited tbh its good but probs not £1 per GB good 
If you use SRT you get the best of both worlds… it uses the SSD as a cache for your main drive.
so you have a 128gb SSD and 2Tb HD
[url=http://www.macstories.net/news/new-imacs-to-use-ssds-as-a-system-cache-for-spinning-hard-drives/]
http://www.macstories.net/news/new-imacs-to-use-ssds-as-a-system-cache-for-spinning-hard-drives/[/url]
SSD here
and its AWESOME
[quote]Rob… (25/02/2012)[hr]Maybethe Mac Book Pro refresh 2012 might have a solid state drive as a read only drive and a spindle drive for storing music, samples ect. and no cd rom drive.
[/quote]
i took my cd drive out and fitted it with an ssd, run all my apps off it and store all my docs/ music / samples on my other internal.
u can buy the bay’s online relatively cheaply
[quote]Rob… (26/02/2012)[hr]Sounds awesome,
Did you notice a difference in performance speed when launching / using applications and did you rewired your catch files to be on the other drive, so they don’t keep rewriting on the solid state drive?
And do you miss your CD drive?[/quote]
performance speed wise is incredible. you click an app and it opens within 1-2 sec.very quick.
i have my cache files etc for some things directed to my SATA drive yes but only to save on space rather than the rewriting issue.
had it in for over a year without any issues - mine is an OCX Vortex II