Regardless of the budget set aside for one component or the other, if in the end they don't work at least reasonably well together the money wasn't spent proportionately. Don't let the money burn a hole in your pocket. Take time to audition enough equipment to develop some sense of the level of quality you want out of a system, then compare that to what you can afford to spend. Trelja speaks wisely. There are no absolutes except that system synergy is paramount and falling in love, true love, takes time. Finding pieces you love that work together takes even more time, but it's worth it. Now, to answer the question more directly, in my case (using retail prices as some components were purchased used) the ratio was equal amounts for amp, speakers, pre-amp, source and cables/accessories (not including acoustic treatments for the room). This was completely unintentional and YMMV.
