My husband and I have 5 year old El Tigre cat from JPW (17.5 feet) with a custom Riverboat Works frame and LOVE LOVE it. I would agree that with any boat you will want to ask about storage and care (ours is stored inflated inside all winter without the frame on ~ we spoil her). JPW makes quality boats that are welded NOT glued.
We just won an October 25th 2016 Grand Canyon launch and can not wait to take our cat down the big ditch. She was made for big water! Congrats on your launch this year, will be interested in a trip report as we will be going a similar time of year next year.
I am sure no matter what you get will be great but do not discount a used JPW if taken care of