Well, that 2000x1600 image will, like I said, get you a pretty good 8x10. "Common wisdom" puts top quality printing resolution at 300ppi (2400x3000 pixels for an 8x10). At the other end is "OK but may be noticeably low in resolution/quality, and that is considered to be about 150ppi, so for an 8x10 you get an "iffy" print with a 1200x1500 pixel image.
The idea of resizing gets brought up with significantly larger prints and the thing to consider there is that larger prints are typically viewed at a distance that ignores the finest detail in an image. So, for example, I have prints from 4 and 5 MP cameras at 12x16 inches, framed and hanging on my wall where at a distance they look "great", but they aren't gallery quality prints by any means.