SLS would be very cool though. The most promising "affordable" one I've seen is the FormLabs Fuse 1 although I notice it's still not available. Plus, I'm using a very loose definition of affordable.
Assuming this is your first printer and you want to be able to do larger print sizes get a FDM printer. 1.75 mm is more common for hobbyist printers at least where I am. So there you go, 1.75 mm FDM. That is, if my assumptions hold :-)
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