You may also want to consider a Ninja 250. A used 250 Ninja is relatively inexpensive and will sell easily if/when you sell it to purchase another bike.
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They are relatively lightweight, handle well, and stop well. Fairly comfortable also.
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They run fairly well also - probably accelerate in the same neighborhood as a HD Sportster (for example) and are MUCH faster than most any other 'beginner' bike. The motor really needs to be revved to move in a respectable fashion, but it is smooth and content to run at any speed all day long. Just don't get on a 600 sport bike - and you will be content.
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I prefer the 250 Ninja over the 500. If I WAS leaning toward a 500 cc bike or similar, there are many other bikes I would (instead) consider.
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