I wouldn't go back to using the standard IDE port on an amiga and I couldn't go back to browsing the net in 640x512 8bit or dblpal.
Plus you can add all sorts of nice things like fast CDRW's, Wireless Keyboards, Cheap Networks card for broadband access, watch TV as a backdrop to your workbench. Proper 16bit sound output for anything that uses AHI, eg Games, MP3 Players.
Makes for a cheap sampling system using AHI Record. You have a choice of PC monitors from cheapo CRT to very expensive TFT monitors.
etc etc
But on the other hand you can do all that for cheaper with a PC, so it comes down to do you want to do it on an amiga or do you want to do it on a PC ?