Bare EQ Magnum heads vs. machining stock Magnums?

Hey guys, so I have a pair of stock factory Magnum heads at the machine shop now which I plan to get cleaned up with a light mill, valve job, new guides, and light pocket porting to the intake bowls. The quote comes to around $700, which I just realized is about the same price as a pair of bare EngineQuest iron heads; I already have the valves and springs from my current heads so I wouldn't need to buy those. Is the factory valve job on the EQ heads any good, and how do the guides tend to fit? Also how would the flow compare to bowl-ported stock Magnums? Also the EQs are advertised at 62cc chambers, is this accurate? I know my stock heads came out to 66cc chambers when I checked them, might give a nice little compression boost since I'm using a stock JY 5.9L Magnum short block.

Just wondering if it's worth going with the new unmodified EQ heads vs. redoing my stock ones...?

EDIT: And no the heads I have aren't cracked, or at least they weren't when I got them; I put about 25k miles on them on my last 360.