Sometime in the next few months I will be purchasing a new telephoto. My old Quantarry 70-300 no longer works reliably with the new Digital Rebel (although it is still fine with the Elan IIe), and I have somehow convinced my wife that an IS L-glass lens is the way do go. Also an extension tube is in the cards for this lens. Primary photographic uses are/will be pictures of my children, portraits, candid photos, racing sailboats (from the water), and some time in the future nature/animal things & travel landscapes. We are planning some serious travel in a few years, and I am looking for something to help me document that. Taking pictures while ON a moving boat (albeit sail) will be a frequent occurance now, so IS has a huge appeal. Also zoom vs. prime here is probably a must, because it can be difficult to reposition a boat to frame your shot... Other lenses in my bag include the EF-S 18-55 kit lens, EF 50mm 1.8 Mk II, and an EF 28-80 f/3.5-5.6 USM (I am not counting the Quantarray 70-300 f/4-5.6 here, since it produces Err 99's too often to use). I was originally leaning towards the 70-200 f/2.8 IS lens and the 2x extender, and still am. My question is, should I consider slower, but apparently more versatile 28-300 instead? I do have reasonable wide angle coverage, albeit with a consumer lens, not an L. It would not be outside of the realm of possibliity to acquire an L wide angle lens in the future. Has anyone actually gotten their hands on the 28-300 yet and taken a few pictures? Any guesses if the "selling price" of $2500 will equate to a street price around the same as the 70-200?