There’s one big difference between the halogens and the traditional bulbs...
THE PRICE!!
Here’s a 2-pack of 100s on Amazon...
$3.56 per bulb!
http://www.amazon.com/Sylvania-19010-72-Watt-Halogen-2-Pack/dp/B00361IPPM
They are coming down a lot, though. They are getting close to $1 each in 6 or 8 packs at Sam’s.