What springs on AFR 205s

I,m almost one hundred percent sure with going with the AFR 205's. Ive noticed that a few of you have them. What springs do you have on them? Im going with a hydraulic roller setup and was wondering how high they will rev with what cam and springs? Is it worth me to get the beehives? What to rev 6500rpms anybody doing this with the stock springs that come with those heads

I was looking at a comp cams
int ex
@50
242 250
total
576 600

I was hoping to have this done for carlisle PA june3-5. But its not going as plaaned. Im in atlanta ga for work for a couple of more weeks and I live in chambersburg PA. Really interested in the rpm. I dont want to buy something that I dont need but extra protection is worth it. I also dont undestand how there could be a difference of $150 in heads and the cheaper one is to the house and the other one is the heads itself.