"Best" is relative to many things such as:
Type of use (road racing, drag racing, daily driver, trailer queen, etc)
Heat capacity (usually caused by abuse)
Clutch Life (friction material wear, spline wear, usable working range)
Streetability (engagement smoothness/harshness, clutch chatter, predicability)
Noise (floater rattle, gear noise, etc)
Pedal feel (stiffness, predictability, travel to modulate)
Cost (how much can you afford)
Value (performance/benefits versus clutch life, tradeoffs, etc)
Shifting quickness (several design factors will influence this such as disc weight)
Safety (modular versus non-modular, SFI certification, etc)
Quick revs (lower moment of inertia will rev/accelerate faster)
For the power numbers you are talking about, there are probably a few clutches that you may consider. Every clutch design has tradeoffs and every person has a different level of tolerance and driving skill. For example if the clutch has full surface sintered iron linings, torque capacity and heat capacity is fantastic because there is so much material to soak up the heat/load, but the disc is of course very heavy affecting load on syncros and ability to shift. As a result some will love it but others will hate it.
This makes "best" difficult to estimate without knowing a lot more information about what is important to you and what you can tolerate. I can go through each item on the list above and what design features affect each one, but that would be like writing a book. Email me at firstname.lastname@example.org
if you have any specific questions relating to clutches. I think you will find I am pretty fair and won't just give you a sales pitch.