I'm too late to chime in but we've used all the Epson printers from R200s on, and the Artisan 7 & 8's have some of the best-of features. I still like the cheap clone-ink of the R200-300s, and I didn't mind them stopping a print-job before it started if there wasn't enough ink remaining.
The RX-5/6 series didn't do that - they stopped in the middle of the job, ejected the disk and PRETENDED it would to-the-pixel perfectly realign the CD Tray for resumption of printing.
The Artisans have a reservoir-remaining notion so that the print job completes and THEN the unit stops, saying the ink cartridge needs replacing.
The Artisan - with the sheet feeder on the backside - consumes more desk-space than the RX-5's, though. I'm not sure how durable the auto-feed-in CD Tray will be - only time will tell for each user.
But this is another good reason to buy two at a time - and let one sit in my closet. The best reason for this strategy is so, when #1 unit finally dies, I still have the unused #2 unit that can spend the next few years consuming the rest of my Artisan ink cartridges.