You can choose 6 megapixels because,
-Wonderful image quality, but high price tags. You can print large photos, even 11x14 or perhaps more, with satisfying results.
-There are some high-megapixel cameras coming out with lower price tags than most, but they usually have very few features.
-Unless megapixels are the only thing you care about (it shouldn't be), don't get a camera that sounds outrageously inexpensive for its megapixel range.
YOu can select
-Canon EOS-1Ds Mark III Digital Camera
-Sony Cyber-shot DSC-F88 Digital Camera