Most inkjet output for photos, especially on photo papers are capable of much more color than sRGB, so is the limitation within SmugMug for sRGB for status quo or based on limitations of the output ...
Are their any quality differences on the output end between JPEG and JPEG 2000 ? Color Gamuts, Pattern / Moire, apparent resolution, etc. Does this change if the output device is a laser based output ...
What is the lowest JPEG compression setting when using non inkjet output that provides a print that most users will not visually detect the compression patterns when not enlarging the output ?