I think if you import those bookmarks into Firefox, then export them into safari, you should be ok.
By "Archives" you mean .rar or .zip files?
Mac can handle those without a problem, although to do .rar, you need 3rd party software, like unrar, or stuffit.
As far as doing redundant backups, its not a problem.
There are several good ones; I am using chronosync now, which allows for scheduled backups either locally, to an external drive, or to a network location.Another one I use is called super duper.
Time machine backs everything up to an external drive, or an internal drive, and set at default, it updates every hour, until it fills that massive drive of yours!
I would use disk utility to partition a piece of that 1tb drive, say 250 gigs of it, for you to use to store other crap.
If you allow 750 gigs for the time machine backup, you'll have every thing you want for a very very long time.
I still haven't installed any windows version on my machine, and, frankly, after 3 months, there was only 1 instance where I had to use my sons Vista computer, and that was to run an .exe file, since you can't run those on a Mac..
I'm sure there is an AC DSee version of for Mac..
I have been using Adobe Lightroom, and PhotoShop, and both work great, and, of, course, they open all your old windows created pictures and stuff..
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