I need help in selecting a zoom lens for my Rebel Xs. I have about $300 max to spend. I understand the limitations this imposes but that is what I have to work with. I am not expecting L quality, just looking for the best of those available for the price. The kit lens is 18-55. I borrowed a Tamron 75-300 for our disney trip last December and it was pretty good. I am looking at the 200-300mm for the upper range. I read many reviews of the ones in this price range but none stood out above the others so I figured I would give you guys(gals) a try. One of the ones I was considering was Canon's EF-S 25-250 IS. Any input would be appreciated. Thanks!