Is that a Mirrycle mirror?
I use them too. IMHO just as much visibility as some of the more expensive brands, but no need to get upset if I bash one. I've usually got a spare to use on my mountain bike.
And when you're ready for the tail-chop, try using a "tight-fit" pipe cutter. I got one from a local hardware store. Cheaper than a hack-saw and leaves a nice smooth edge. Your original plastic bar ends will work perfectly as frame plugs for the chop.