Crossbow/Broadheads

[Cossack]

After years of rifle hunting, then single shots handgun I've 'come over to the dark side.' Got a Parker Terminator with tri reticle red dot, 150 lb draw, allegedly shooting 100 grain broadheads, at 320 fps.
(Will chron it soon). Been practicing several evenings and can hit a softball sized target consitantly at 30 yrds.
Now I need advice on broadheads. What should I be looking for? Which are best?