hey voodoo,
great advice from BMF, I changed over to archery hunting about 7 years ago and I love it . Go to the archery shop and let the guy's help ya, most any of them are great . I got a hoyt rapter, at about 70 lbs,with a 28" draw lengh, and shoot gold tip carbon arrows with 100 grain cabela's lazer pro broadheads.
I,ve got 2 elk so far and they seem to do the job just fine. If you spear one , just be patient and mark where you shot from and where the elk was when you hit it. Very important that blood trail, sometimes they don't leave much of one. good luck