With regards to printing, I'd like to be able to resize/resample. When I make print files I resize them so a Costco employee can't mess them up.
Whether the image is heavily cropped or not it must be cropped to print in the standard sizes. If you don't crop it the photo printing lab will crop it for you, possibly not where you would have. Once I crop I want to resize; for 4x6's I am looking to create an image file that is 4 inches by 6 inches with 300 dots per inch. For my 8x10's(or12's) I want to create an image file that is 8 inches by 10 or 12 inches with 240 dots per inch. For 12x18's it would be 12 inches by 18 inches with 180 dots per inch.
Since I was not able to find this function in Lightroom (or Aperture) I never got to the point of looking for the Unsharp Mask (or similar in Aperture). Is there Unsharp Mask in Lightroom?
I also like to have control of sizes for web use. My usual sizes are 500, 600 or 800 pixels on the long side with 72 ppi. I use Unsharp Mask here as well, but with different adjustment numbers from print files.
PSE 4 (mac) was $20.50 shipped off eBay. The lowest price I've seen for Lightroom (non-intel) is maybe $249.99.