A general rule for head bolts is to pull the old ones and throw them away. They stretch when you torque them down and I've read that they will not torque down correctly the second time around. I'd be willing to bet that they would be ok for a basically stock engine, but are you willing to risk it?
Also, you will probably pay close to what it costs for ARP bolts no matter where you find any brand. I think Summit sells the ARP bolts pretty cheap so you might check there before you worry too much about emptying your wallet. I'm going through the exact same decision as you right now and I've opted to go ahead and get the ARP studs.
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