Congrats on the new printer, Frank. I also just purchased a new Epson printer, WF7820, that prints 13 x 19 and it has a 50-sheet auto feeder on the back where I feed 11 x 17 paper. It also has the standard 8 1/2 x 11 tray that will hold 250 sheets (half ream). It took me a little while to figure it out and get it to print correctly (drawing paper from the correct location) but now that I've got it set, printing is a snap. Like you, most of my pieces are 11 x 14. It is also a multi-purpose like yours and prints excellent photo quality. It does use cartridges rather than having the tank but I can purchase a lot of cartridges for the difference in the cost between the ET16600 and the WF7820. The only thing I wish Epson would provide is a service like HP that sends cartridges when the ones in the printer starts getting low. I believe Cannon also provides something similar through Amazon.
Again, congrats and I hope it works out perfectly for you.