You said this was a brand new printer, "still sealed in the box". I have bought many HP printers and they all came with rip-off (IMO) "demo" cartridges (only partially full
). Didn't this printer too? If so, not sure you would need to buy any replacements - for awhile, and then only a full black (if color is not needed).
I kind of think that the laser presents more problems than it solves... ...because it doesn't have any FAX or scan functions
Well, of course that is not a laser problem - but the fact it is a "printer" and not an "All-In-One multifunction printing device" like your inkjet. I have an HP6500 AIO Inkjet and it takes up a lot of space but a LOT less real estate than a separate printer, scanner, fax, and copy machine would (and all their data cables, separate power supplies and power cables too). And in my case, with it networked, it is located in a central location, and off my desk!
My old perfectly good laser printer is sitting on a shelf in the basement, next to several old, perfectly good CRT monitors and other electronics hardware deemed obsolete before its time. The cost of progress, I guess.
And of course, the folks at Staples, OfficeMax, OfficeDepot would argue their aftermarket stuff is equal or better quality. And I suspect they are better compared to some - especially the no-name stuff on eBay. The big brand stores likely have better quality and consistency control across the inks and ink batches too. I suspect if you buy from Staples, for example, and it works fine, then continuing to buy those replacements from Stables will be fine. But all it takes is one bad one to gum up the works (literally!), and I don't suspect any of the aftermarket suppliers will cover damage to the printer from a faulty cartridge. But Canon, HP, Epson, Brother, etc. will (assuming the printer is still under warranty).
I guess it depends on how much you print, and how important print quality is. If the idea is to have a "hard copy" on file, then as long as it is readable, the quality is not that important. But more and more "paperwork", including our own personal and home finances stuff has gone "green", "paperless", "digitized". I can't remember the last time I actually "wrote" a check. And for that matter, I rarely print out reports anymore, but attach them to an email, or just keep them as files on my computer. I just printed out a new "Proof of Insurance" card my insurance company emailed me. But only because the law requires I carry a copy in my truck. But even that startled the printer out of hibernation, its been so long since I printed anything, it took forever to actually start the print job.
If you are looking for a new job and will be printing resumes, or important sales or presentation "reports" for your work or school, and top quality is important, it is hard to beat a good laser printer (with the right paper, anyway). And for that I just think the genuine ink is the safer bet.
That said, inkjets can create some great printouts too, with the right paper.