I don't know beans about them, last time I shot an arrow into the air the bow, when unstrung, was staight, about six feet long, and the arrows were made of wood, with real feather fetching. But I have been workamping in a store that sells lots of archery stuff, the owner is well known in the area for his ability to fine tune a bow to the shooter, etc. After having listened to him sell more than one bow that, with all the bells and whistles, goes for over $1000, I can only suggest that you go to an archery shop, and talk to the people there. Hopefully they will be as knowledable as my guy is...
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OBG