Never got that far, begged my parents for one when my first C64 died. Even my dad was tempted at the time but my mum put a stop to it and i ended up with the 2nd gen C64 (the white one with poorer SID chip)
I also had my original C64 die and it was replaced under warranty by the angular white one with the "hissing" SID chip.
We got our A500 quite late in the day, we bought it second hand around the same time the A600 was starting to replace it. I still loved my C64 even after years of playing on friend's Amigas, and to finally have both was amazing. Even though the Amiga blew away the C64's graphics and sound, I am still convinced some games played better on C64 - Rainbow Islands comes to mind.