Originally Posted by
jawnee
Basically, I want to experience the "feel" and ride of a high end, high quality bike and I want the confidence of knowing that the bike is safe, reliable, and durable.
I don't see any point in putting money into upgrades if you are happy with how your bike rides. If you really wanted, I would say switch from 7 speed to 8 speed, which would mean changing out the back wheel, switching from a freewheel to a freehub, and upgrading the shifters. But it wouldn't really make your bike all that much better.
If you just want something different, do some research and buy another bike.