I guess it depends on what "I" already had and what I wanted. If I didn't own a gps and socouted new ground alot I'd find it indispenceable. I have access to large tracts of land in the nothern parts of Maine and New Hampshire. Often my scouting is done imediatly after the season so it's the better part of 9 months before I can get back to hunt. If "my situation" resembled this I'd pick up a gps. A bottom of the line etrex from garmin is suficient.
If I were unhappy with something on my bow I'd look to replace it. Be it a sight or an arrow rest or stabilizer, now would be a good time to make an upgrade.
Your question is very specifis to an individuals want's or needs and it's tough for me to guess what you want. I wish I had you're prediciment. I'm sure I could come up with something to spend the loot on.
I wish you the best of luck