For me, I would say Intel all the way.
G5s seem to have a number of reliability issues - from faulty PSUs to liquid cooling systems leaking - if you Google around, you can see images of the aftermath. Not good. Further, the G5s are slow compared to Intel machines - don't know if that is because software wasn't really optimized for the G5 or because the Intel chips are really that much faster. If you're going to use current software that runs under leopard, there's really no reason not to get an Intel machine... but if you're going to run older software, you'd probably be able to get a nice G4 that would do just as well as a G5 for less money.
Just my personal opinion.
G5s seem to have a number of reliability issues - from faulty PSUs to liquid cooling systems leaking - if you Google around, you can see images of the aftermath. Not good. Further, the G5s are slow compared to Intel machines - don't know if that is because software wasn't really optimized for the G5 or because the Intel chips are really that much faster. If you're going to use current software that runs under leopard, there's really no reason not to get an Intel machine... but if you're going to run older software, you'd probably be able to get a nice G4 that would do just as well as a G5 for less money.
Just my personal opinion.