1) I am awesome...
2) Whoever quoted you the wheel and tire was on crack
3) Dan's numbers are less cracked (you can get the rim cheaper if you
shop around... the tire price is the best i have seen anywhere)
4) The tire that is on Tire rack and discount is right... BFG builds only two versions of this tire... one designed for the H2 Hummer the other for the Raptor... The raptor version is slightly larger than the H2 version... the Hummer version also is a higher load rating IIRC... if you look on BFG's website the tire you need has a little F in comments the other one has a G (again IIRC)... there has been extensive discussion of this.
5) The OE tires cost less than the HUMMER version at most places.