Another option to test on unclogging the nozzle is to create a 1"x1" box in the desired photo program and look up the color code (if it's yellow, than type that info in the web search)- something that should come up is http://www.computerhope.com/htmcolor.htm
You would type the Yellow info into the color pallet to get the exact color. Once you fill the box, do some test prints on letter size a few times as it should only use the yellow and hopefully push thru any air bubbles (clogs) out of the nozzle.
If that doesn't help resolve the nozzle issue, I would recommend either HP or Canon. Preferably Canon since HP has slowly discontinued many of their large photo printers which most of the ones left are Post Script (PS) editions. You will have more selection with Canon and they are just as reliable. Canon also comes with many more features than HP and they both have the replaceable print heads which helps to continue printing after replacing right away. I've heard more customers happier with Canon and HP, but not saying that Epson doesn't make a good printer. They all print great quality images...but the Epson print head issues are their biggest problem.
The nice part with Canon is that if a print head goes out or is defective within a year, since it's under warranty, you can contact Canon and they will send you a replacement at no charge (one head around $450- 2 print heads in the large printers). HP will have 6 on most photo printers at about $50-60/ea.
Our office had the Canon iPF6450 for about 2 years with very little issues. It found a clog nozzle and immediately fixed it. No print head replacement was replaced while using it. We printed almost every business day from sheets up to 24" rolls. As long as you leave the printer on, it will do automatic cleanings to help keep the head ready (this is for any brand). Though humidity and other conditions can also be an issue at times.