Well, due to illness I can no longer hunt with my compound bow.

In PA you can hunt with a crossbow if you receive a special permit from the PA Game Commission. So, instead of giving up a sport that I love I decided to get the special permit. I just got back from purchasing a Ten Point Titan TL-7 crossbow. I looked at and shot several different crossbows and this one was the one I liked the most. My question is this, for those of you who hunt deer with a crossbow. Is there anything I should watch out for when shooting at deer other than the normal issues for a compound. I have taken more than my fair share of deer with a compound and recurve bows so I am aware of string jump and all that jazz. What I am looking for are things such as..
What type of broad heads do you use. (I have always used Wasp or Muzzy, bad to the bone

)
Do you use Three or four blade? (I have always used three)
Fixed or expanding blade? (I have always used fixed. I just never trusted the expanding blade design)
What grain broad heads? (I have always used 100 grain)
I think that should give you the idea of what I am looking for.. Any other suggestions would be appreciated.
I would like to say that I was surprised by the accuracy of the crossbow. At 30 yards, shooting free hand, I put every shot in the boiler room on a full size deer target. They are also very fast although I can't imagine they have the same kinetic energy that a larger arrow would have.