OS 4 is a HUGE improvement over OS 3.9. IMHO if you enjoy using the classic and want to continue to do this...if you can secure a CS PPC that would be cool. I am sure you will like OS 4.
If you aren't so tied to the classic you may want to try and hold out for the possibility of new hardware to run OS4 or a used AmigaONE.
For me I enjoy using the Classic hardware...there is a certain feeling about it that you just don't really get with the new hardware. If the underlying hardware isn't there it really isn't the same experience for me - even though the same OS may be running.
Amithlon and of course the MicroA1 I have are pretty good, though
MicroA1 is very speedy on OS4!
