If you want to get more speed for little cost
check Aminet under 'Hacks' I think. There is
exact instructions on hacking the A500 and also
the A2000 which is really the same as an A500 to
14mhz. Or if you can find someone with an 
'Supra AdSpeed'.. the adspeed runs at 28mhz but
that is only the processor, the bus is still
at 7mhz. It gives a fair bust for the money.
As I remember they were about $100 give or
take, when new. I have one for my A500, I felt
it was worth the money.
Actually..I have thought for quite some time
that if I installed a new 28mhz crystal which
would bump the bus speed to 14mhz (I think)
and the 28mhz AdSpeed it would give a nice 
boost to the A500, the same would apply to
an A2000.
Mel Ott