Just to put this out there for ya..I fished with Quality mono for many years, in all types of conditions, and caught my fairs share of bass, won a few local club tourneys with mono on a gin clear lake. As for stretch, cheap mono will stretch more than expensive mono. Sensitivity is controlled mostly with you, i.e. keeping a finger on your line at all times.
Mono also has qualities that fluro doesn't, i.e. better knot strength, and less memory in most cases. These are things to consider if your wanting to make a change. Whatever line you buy, do yourself a favor, and buy the best quality you can afford.