I'm in need of an upgrade from a 3.2 mp point and shoot. I'm willing to spend up to $800.00. I need a camera that can produce high detail poster sized pics. Is SLR the way to go? heres what im looking at so far: nikon d70 6.1 mp cannon eos 300d digital rebel 6.3 mp nikon d100 6.1 mp fujifilm finepix s2 pro 6.1 mp Please help me decide which is best out of these and if there are a few others worth looking at.