If you're working at 800x600, do you mean your output image is that size, or do you mean your monitor is set to that ratio? Don't let the monitor's aspect ratio box you in too much. Go for some wide shots, or tall ones, you can evoke different emotions from each. Sharpness? Do you mean sharp like Rochr's images or sharp like MrDodoBird's? I'm not sure I'm following the sharp concept...