Have a few ESCOM boards here with no visible cap leakage, yet. All of my C= 1200's, and 600 motherboards, had it to some degree or another, and were replaced. (Done oodles of 3640's for a friend, too.) In fact, I bought a few 600 boards as spares that were basically obliterated from the cap leakage.
The older models generally had good quality Japanese caps, from what I've seen. Not to say they shouldn't be replaced, but I've only done it as a preventative measure in the ones that were heavily expanded with accelerators, zorro cards, etc. Never had a dead A500 or A2000 motherboard from capacitors. A good A500 is still as reliable as they always were IMHO.
The SMD caps aren't too bad to do, anyone good at electronics repair should be able to order the parts and replace them easily. (I'm no expert and was able to do them perfectly, with a little practice!) There are quite a few around these parts who would gladly handle the task for you I'm sure.
