Pretty sure I've never heard any of the better shooters or hunters I know (and I've known a few) talk about needing the fastest bow made to get the job done. Another thing I've noticed they have in common--they can take most any bow, shoot it a few times, and do just fine with it.
Nothing wrong with a fast bow, if you can hit what you are aiming at and it doesn't blow up on you the first time it's pulled to 28". It looks good on paper, but I'm not convinced there's enough speed difference in most to make a real difference in yardage estimation--seen it too many times, done it too many times when shooting different bows at the same tournament. Some days I shoot the faster bow better, some days it's the slower one.
At any rate, it should be made clear that a few extra fps is no substitute for practice, tuning, good instruction, etc.
A good archer can take a 150 fps selfbow and shoot it well. A good hunter can take that same bow and make meat with it. The fastest bow in the world (pick one) won't make a lousy shooter accurate, or a lousy hunter deadly.
Need proof? Watch some old clips of Fred Bear, Ben Pearson, Howard Hill, the Wilheim brothers...they shot what would be considered slugs by today's standards...and who can begin to shoot as well as they did?