Please chime in with your thoughts on a package deal I saw on Ebay. here's the link. http://cgi.ebay.com/Tamron-2-Lens-S...42QQihZ006QQcategoryZ4687QQrdZ1QQcmdZViewItem Caveat: Ok I know everyone has issues with aftermarket lenses so put that aside for just a moment. I was about to buy a 17x35mm Tamron lens (low dispersion glass etc) for around 280.00 when I saw this package deal on ebay. The 28~80 is probably the equivlent of your standard kit lens and I've already got that covered with a nice Canon lens anyway. The 70~300 mm di ld (digitally integrated low dispersion) lens is the one I'm most interested in. My concerns are: why so cheap, according to the site this comes with a six year warranty but I've never bought anything from this merchant before, F4~5.6.. Am I going to have issues with that (ie: not enough light reaches the film)? Ok so I would like you to weigh in on this even if you only buy canon/Nikon etc because I'm naturally suspicious of anything I see on ebay. I need to hear back soon because I've got to spend this money before something else comes up.