It's a nice bike. I'm old, and when that bike was current, I was a mechanic in a bike shop. I sold and repaired a few of those. It was considered a nice upgrade from the previous Super Course model. The geometry of the frame and fork were very changed, from a sport-touring geometry to a racing geometry. Components were upgraded.

Yours has been modified. It originally came with SunTour Cyclone derailleurs and bar-end shifters. I see the front brake has been changed from center-pull to side-pull. The whole derailleur system has been changed, and so have the pedals. I'm pretty sure that wasn't your original crank. Most of these changes would be considered downgrades, but they're not really that substantive. Your bike will ride the same as the original.

If the tires are ready for replacement, invest in the best tires you can afford. That's where your money is spent best.