Back in my MM days before they added the most recent +20 Agility to a 1H weapon enchant, I ran with two one handers, each with +30 Int. The extra mana and attack power were great, especially compared to the +15 Agility enchant, which used old content materials (read EXPENSIVE), and was hard to get.
For now, though, with the improvements to Aspect of the Viper, and the ease with which you can get +20 Agil for a 1H weapon, I do not think +30 Int is the way to go anymore.
Once WotLK is out, the Int = An attack power boost talent falls within reach of all Hunters. There may be some legitimacy in having the best +Int enchant on your weapons over +Agi. Time will tell, and I will leave that research to the Mathhammer crowd.
Shelor007