Originally Posted by
Training.Wheels
Framewise, you might not feel the difference. Buy the Pista if you really like the brand and looks, but if you want to truly upgrade, upgrade the components that affect ride quality the most, such as the wheelset, tires, and saddle.
+1
Also +1 to a geared bike, maybe a road bike or a touring/utility type bike you could throw a rack and panniers on. Or a hardtail if you have some dirt trails nearby.