The Holley is a decent unit. You might also consider a 52mm BBK. They are cast, not billet, but function well. I can get a BBK 52mm shipped to you for 299.95: http://stores.hi-potek.com/-strse-72/99-dsh-03-5.2L-&-5.9L/Detail.bokIt's a nice piece, I have one and we have one on our 5.9 jeep.
I wouldn't buy it new, you can get them for 2-300 used. A throttle body doesn't exactly wear out from a few thousand miles of use. Be patient and one will pop up.