an old radio program.Wink

It is apparent that the 5100 series has replaced the 4700 series. The 5100 series also has the 64-bit support (EM64T) with the 5x1 processors.

You may note the 9100 series has replaced the 8xxx series and also includes the new 'Dual-Core' when customizing that also has the EM64T.

If you are going to EBay, you may be looking at used, refurbish 4700's.