Honestly if your coupons are mostly black text, a small mono laser avoids the drying issue entirely but then if you do want inkjet, pick one where the head lives on the cartridge and keep it powered. Dye only heads that are permanent are the fussy ones when they sit. Paper wise I like 24 lb bright white since 20 lb tends to curl and misfeed, and it gives coupons a nice cut edge feel. I tried 28 lb and it worked but you need to tell the driver you are using heavier paper so it slows the feed, otherwise you can get a little skid and a crooked top margin, which drove me nuts.
They're great for the price and I've tried many. They obviously don't hold up to more premium models like phonak or enhance but those will run you a few thousand bucks. I'm on a budget and they're perfect for me.
