Hey all: Looking for a good "walk-around" lens for my Sony Alpha. This is purely from a hobbyist/enthusiast perspective. I'm looking to purchase an 18-200mm (or similar) and wanted opinions on a couple (if anyone has tried them). I know that this type of lens isn't going to be the best at, well, anything really - but I'm looking purely for something that will be useable in lots of situations. I already have my 18-55mm Sony kit lens (and a second Minolta kit lens, 35-80mm, that I use as a "beater" for the beach, ATV rides, etc.), a 50mm f1.7 Minolta prime, and a 70-200 f4 "beercan." I've looked at these three: Sigma 18-200 f3.5-6.3 - $279 @ B&H Tamron 18-200 f3.5-6.3 - $229(AR) @ B@H Or... I can get the Quantaray 18-200 f3.5-6.3 at a Ritz camera closeout for $135. Supposedly its the same lens as the Sigma, but closeout priced. Its new in box, too. Obviously if all things are pretty much equal, I'll buy the Quantaray for half the price. If not, does anyone suggest one of the other two for good reason? And if none of these are really feasible, does anyone have a suggestion for a comparable lens in the sub-$300 price range? Thanks!!!