^ Well you are lucky then, most of us are not with regards to the little old A600, but the fact of the matter is newer Amigas are plagued with CAP issues so the OP asked if he should buy an A600 or keep his old trusty A500, so I threw him my two pennies. 
Not sure about you but If I had a choice in a retro computer where I did not have to constantly be replacing caps I would pick that one. The A500/2000 series do not have SMD caps to replace like the A600/1200 and 4000.
But hey he can get it and have both! (Like me I collect all Amigas) But just don't think you can replace the A500 with a A600 as you might end up having a dead Amiga sooner than you think 
A600 has nice and simple standard IDE interface, try finding an AdIDE board for an A500/1000 now anywhere.....end of story. If you never use the HDD then OK but most people would like a reasonably quiet and fast IDE drive inside their Amiga.
