Dstoneburg--
If i may, I'll suggest against a radiata for the time being. My primary reason is P radiatas are touchy lions, esp for new lion owners.
The fish don't ship well and they are difficult to wean over. So finding a quality one is not as easy as heading over to the LFS. Next, during the longer wean over period, it will require you to feed live foods (read ghost shrimp) for a few weeks to months, and of course w/ a tank full of fast swimmers, lionfish won't get a lions share of the food. Infact I would even suggest that if you do consider a P Antennta or Radiata that you wean them in a Q tank away from competition, and once they are eating prepared food, then introduce them into the tank w/ more food aggressive tankmates.
Lastly, I will also suggest you do a google search for "lionfish info sheet" and spend some quality time reading about the various lionfish available and what it will take to care for them. If you own Scott Michaels book Reef fish volI it also has a great section on scorpionfish-well worth the read
frank