parker does make a very good bow. I am a huge mathews fan, and if I didn't shoot those, I would definitely shoot a parker. they are really lightwieght, which I love. You mentioned the ripcord fall away rest- They are great rests, but I would not choose it if you only treestand hunt. fall aways are designed for competition in mind, becuase they are the most accurate, but they also require the most tuning and depending on the rest, your arrow may fall off a lot. I have a mathews fall away on my bow, and if I tilt my bow to go around a branch or something, my arrow falls off. But the only reason I have a fall away is becuase I shoot competition. if you do not plan on doing this, I would suggest a whisker bisquit. they are great for a hunting purpose, however you will sacrifice a little accuracy.
Back to the subject though- parker is a good choice. If you can, buy from a local dealer, not from cabelas. Cabelas will not treat you very well , especially if you have problems. just have your local guy price match. plus cabelas does not do trades.