Rebuild 915 heads or go aluminum?

What did you need to have done to them? I was looking at them for a while, but have read a lot of bad reviews.

Hotrod did an article a while back comparing them to 915's. They said they were worth the money, but their dyno results showed about a 10 horse and 10 ftlb increase compared to the gasket matched 915's. That's a lot of money for 10 horse.
Just had them looked over and squared up... They weigh like 60 lbs less than the stock heads! That's a lot of weight loss... SO that adds into the equation. Also, the newer ones have better parts on them, and are better quality than the older ones... 915's are only good with porting and such done to them, stealth flow better out of the box...
My setup is not finished yet, still doing some electrical...