Hi spv79,
I'm sure you are not a newbie to photography, given u've had good experience with a film camera. And I also assume you don't own some faulty 30D or lenses. Is DSLR is something u are new to?
If that's the case, I can empathize with your situation. Moving from film to digital, you will feel that your images are never as sharp as what u got from prints made from films and slides. Did u shoot in RAW or jpg for your 30D?
If in RAW, I can reassure u that if u do not do post processing, the sharpness of the images are usally not optimal. Yes, even if u use expensive L lenses. In fact, you might wonder why the heck u were foolish enuff to spend big $ on a cam body + lenses and get peanuts when even a compact digicam can do better!
But that's the problem (for new photographers into digital) or an advantage to the exprienced. Cos RAW allows you more freedom to decide how u want to manipulate your images, which includes sharpening. For prints, the sharpness and colors are adjusted by the print labs.
If you shoot in jpg, try increasing the sharpness level in your 30D. See if it helps.
Pls do tell me how it goes...