hello 1. im in the market for an entry/ intermediate level d-slr. the bottom line is that i want to be abel to make large prints (5 to 7 Foot wide or so) what how many pixels/ resolution will i need, better yet what camera would any of you recomend that will get me close to my desired print size? 2. i have noticed that some of the online retailers have significantley lower prices on d-slr's (sometimes as low as 1/2 the price of a brick and morder store). Are these lagitimate? should i avoid these? it almost seems to good to be true. thank you!