Use JPG, but keep the quality high (or best even). Although JPG is lossy, at best quality, very little is lost. This will obviously depend upon the software used to convert (Photoshop or PaintShop are recommended), but good JPG compression at best quality will be indistinguishable except upon close inspection. The file size with the JPG compression is phenomenally smaller than using TIFs, even at best quality. If this was for a professional job or clients, TIF might be warranted. But for download and general sales, JPG is a much better bet.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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