RE: which crossbow to buy
Everyone has their favorite!! Best thing you can do is go to a good shop and try several. You should try compound and recurve CB's. Try Ten Point, Excal, Desert Stryker, Parker, Horton. Chose which one fits you and your budget the best. All haveshoot very well and the upper end models shoot about the same speed, It becomes a a personal choice. All those companies offer life time warranty and all have very good customer service. None of them will be quiet, as there is really no such thing as a quiet crossbow.
Red Dot or a scope is again a personal perference. Some scopes,like the Lumizone and Varizonehave ranging horizonal lines that can light upand adjust according the the arrow speed. Red Dots can have one or three dots. The multiple dots correspond to different yardages. Look through several and see what works best for you.