Answering your question. The XT was a real hassle to get when I wanted one (here in Ontario). The Allegiance I bought in 2005 and in 2006 I bought the Tribute. This year I continued hunting with the Allegiance while the Tribute stayed at home. The difference between the two BowTech's isn't that much, other than speed in favor of the Allegiance. The Tribute is shorter A/A, slightly lighter bow. They're both fine bows, however I have a difficult time leaving the Allegiance at home.
You wouldn't go wrong buyingeither and have it properly tuned to your DL, etc. Take a look also at the New MathewsDrenalin and BT-Guardian, also the 2007 Allegiance.