Getting a newfangled HDV camera is not the only step to beautifying your next production.  In fact, with the increased resolution of your camera, you now have a new set of concerns: your set-dressing, makeup, and lighting all have to step up as well.  EMediaLive takes a look at a number of recent development in the lighting world, including LED and fluorescent options.  The author skips some of the more established soft-lighting players, like Kino-Flo and Chimera (both of which I've gotten great results with), but if you're not sure of your exact needs, you should talk to your local rental house anyway.  Try before you buy, or don't buy at all, if you're only shooting occasionally.