The funny thing is, since I know Joe, I know his advice doesn't differ much from what Otto and JR are saying. Basically get the best you can afford, work on your lines, slow in, fast out and consistency will come. He just happens to get nice stuff for himself and makes it work (ie. we're all chasing him!).
So when a new Turdigy popped up locally for sale and knowing others on here have been doing well with it I figured I'd give it a shot. And yes, my Mi4s are all "old" now, but I can't justify getting rid of them yet. I didn't spend much on them and I'm still having a blast locally.