In the past I had run WinUAE on my AMD Sempron PC and the performance seemed to be about 3-5x as fast as my A2000 w/ 68030. After reading this thread I went and had another look and found out about the JIT option... it is true that UAE running on a cheap PC blows away any real 680x0.
Although I usually like to play around with real hardware more than an emulator, I would still say that UAE is a great alternative to the expensive "high-end" classic Amigas.
