hey gang, finally took the plunge and got myself a rebel xsi. i've had a keen interest in photography for a long time now but never could bring myself to buy myself a dSLR. i'm on a really small budget right now but wanted to know what lenses i should be considering either now or in the future? i know there's sigma/tamron lenses as well... i want the best bang for my buck with great quality.. light lenses are preferred. i'm looking to get into wedding photography eventually (just an ambitious dream of mine) so far, i have the: - 18-55 IS kit lens - i'm looking to get the 50 mm 1.8 II (nifty fifty) used - and i just ordered the 70-300 MM USM III (i know there's mixed reviews on this, but i'm getting it free - i figure it's better than nothing) thanks for any advice !