I agree with all except there is no reason to get a separate app to unrar files. Mac OSX has built-in Stuff-it Expander which works on RAR files. The expander has low footprint so you can't say it's crap -- it's practically built into the OS.
Also, I think any Mac user who has used Windows before is going to want Parallels. Especially for Torrents, as no Mac client out there cuts it. It is very easy to setup and use, and might be able to *cough*magically obtain it*cough* on your usual torrent sites...
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