I have used the M-Audio AV40s for a couple of years, they are OK, and that is far as it goes, they don't handle bass too well. I would switch them in an instant. I have no experience of the Tannoys but due to my experience with the M-Audios, being my first monitors, I would also recommend saving up just a little longer so you can get something of a higher range. When I was buying, i was looking for the cheapest fix really, which I now regret.