Hi, just a couple of quick questions which I couldn't find an exact answer to after searching. 1). Looking at getting the previous iMac version 24", 2.93 GHz. My local Apple store still has one or two left. It's also available as a refurb for about $250. less. The warranty seems to be the same (one year), so, all things being equal (and assuming both refurb and new model are defect and trouble free), is there any advantage in buying the new one? Any other consideration that may be a factor either way? If I order the refurb from the Apple website, is shipping still free to Canada? 2). Does this version of the iMac support dual monitors ? If so, does it both span and mirror? Thanks.