Preferred image format for displaying product pics

First of all I am very impressed with the image zoom feature in v4.

I am going to take advantage of starting new store with v4 (as soon as the import tool gets reworked).

I will import all info from v3 but I want to add all new images and I am able to save these images in many formats using Corel Draw X4.

What is the best format to use in CSCART? JPEG, GIF, PNG ?

Also at what dpi quality?

GIF is normally best for images with text on.

PNG is the one I prefer but it does produce slightly bigger files.

This can be negated by using a program to remove the meta data from the image file.