Want to put a red dot on my new FNX 45 Tac. Debating between a Burris FF3 vs Vortex Venon. I read quite a few people have put the Burris on the FNX but only a few are using the Vortex. I can get a pretty good deal on the Vortex (about $55 cheaper than the Burris). For what I understand both mount to the FNX with the supplied hardware without any modifications or additional purchase. What do you guys think?