I called around and folks told me I should have a minimum of 10 to 12 inches which meets the minimum code for a R-38 insulation value.
I had Krieser Insulation blow in what looks to be nearly two feet more in to my attic this morning. If I remember correctly what the owner said on the phone, I should now have an R value of 50. Two of my neighbors have done this too and one say's he's saving $1200 a year on gas and electricity. WOW!
I have the house opened up today and will be watching the thermostat closely!
The Krieser guys were right on time and did the work fast with minimal mess. Thanks Krieser Insulation!