I would suggest waiting until after hunting season if you hunt out west. You will have to totally retune after strings and I've seen that get into peoples heads and make them loose confidence right before season starts.
As far as strings, Park-n-Sons, High Voltage and Johns Custom Archery would be my top recommendations. I've also used Gas strings and they seem like nice strings but to me they are more of a mass production type company. If you need them ASAP Gas, ABB or some other large manufacture will have some strings in stock. You will be 6-8 weeks out from the others mentioned above or possibly longer.