In addition to the Spaghetti Factory, Demo's and the others mentioned, check out Cafe Provence, by the library. You can get great gourmet salads, sandwiches and baked goods.
Also in the downtown Nashville area is the Big River Grille (the same one that you find in Disney's Boardwalk). Prices are better than at Disney

.
The real Pancake Pantry is in the Hillsboro Village area (not near downtown) and it tends to be very crowded (as in, lines all around the street) at peak times. But it is definitely a Nashville experience and (at times OTHER than the CMA's) you may run into Country Music legends eating there.
If you go to Hillsboro Village to find the Pancake Pantry, you can also check out some of the restaurants that cater to the college students (Hillsboro Village is practically next to Vanderbilt and not far from Belmont University) where you can also save some money.
As for the Loveless Cafe, it is WAY out of town and hardly worth the drive unless you are going to be in the area a while. If you are, then a visit to Cheekwood Gardens (which is on the way) might be fun.
Also, the Grand Old Opry is right next to a huge shopping mall called Opry Mills, and the food in the foodcourt is as reasonable as any other foodcourt. Food at the Opryland Hotel is overpriced, and you also have to figure on parking ($8 I think, per day--maybe more.)
The Embassy Suites gives a great breakfast, so my suggestion would be to fill up on that, get salad and so-forth fixings for a light lunch and/ or supper, and eat one meal at one of the downtown places recommended above.
Enjoy yourselves!
