Arrrrg, Tabloid sized scanning and printing together... This means BIG$.
Unfortunately, my more modern HP paintjet has had it's share of problems too. Clogged Cyan, a new print head + super expensive paint cartridges (using cheap ones just clogged the print heads) & the printers insistence of not printing when a single color is low has pissed me off with the added problem of the printer continuously failing to grab the 11inx17in sheets even after cleaning the pickup rollers many times has ended my affair with paintjets. My 12 year old Epson, which I'm sorry I gave away 2 years ago, was a beautiful but slow 17inx22in printer. I gave it away after buying the HP, but before the HP started giving me all the headaches since I only print large form factor for schematics & PCBs once in awhile.
I looked for color laser tabloid 11x17, but to no avail due to price. I settled on a 225$ Brother color Led/laser 8.5x14. It has yet to mess up grabbing paper. You can reset the toner low warning through the panel to empty out the toner before replacing the cartridge & no paint clogs, or, mushy print where I can use highlighter on my printouts without the smudge.
I get my 11x17 or larger prints by printing to an Adobe .pdf & use the poster option in Adobe's acrobat reader and tape 2 pages together. I know it's not elegant, but, the printouts are perfect quality on plain office paper.
As for Tabloid sized printers, until paintjets stop clogging due to the printer just sitting there, I cannot recommend buying one as you would just go through the same old experience again no mater the make or model.
If you have the $$$ and workload which requires it, look for a color laser tabloid printer and only use the manufacturers toner cartridges, no DIY refills. As long as you can software reset the toner cartridges out of toner gauge as a feature in the printer control panel, you will get double the B&W and triple the color page count as described in the printer's user guide. Strategically color use on schematic should double these figures as the figures are averages for full color image prints, not electronic schematics. Unlike some paintjets which will destroy the printhead by bubbles & drying out, it is safe to run a toner based laser printer until the cartridge is empty.
I personally don't like exacto blading 1 edge of an 8.5x11 print and taping it to the next sheet to make a really close to 11x17, but, it turns out to be less of a pain than dealing with a paintjet's problems when the day comes you actually need a print to print...