Go to a local matthews dealer in your area and let them help you. Are you new to archery in general or just to the switchback? If i could suggest one thing. Keep in mind that everyone has opinions on what to get and how to do it.
a couple of "suggestions", choices
Sights, there are many, use what works best for your eyes:
fuse, spot hogg, cobra, copper john dead nutz
rests: I would personally go with a drop away and there are many to choose from
the matthews rest is great, trophy takers are almost indestructable
too many stabilizers to choose from but doinkers are great
arrows; easton, beman, gold tips, you can't go wrong with any of those MAKE SURE THAT THEY ARE PROPERLY SPINED FOR YOU DRAW WEIGHT
i would suggest a wrist sling so you can have a nice open relaxed grip on you bow
I always put limb savers on all my bows, this one doesn't need it but I do it any way.
I hope this gives you a starting point.
Good luck
teamt
let me know if you need any help as I work at a bow shop