Bare EQ Magnum heads vs. machining stock Magnums?

If the budget is tight, and the Magnum castings you have are in good shape, you could always run them the way they are for now since they have upgraded springs, then do a good set of EQ replacements later as an upgrade if you decide you want more power in a couple years. Check the valves and seats, and decide from there. Don't worry about even looking for cracks if the valves will still seal.
I am all for doing it right the first time but if the valves seal, you only have to buy gaskets right now to get it running.