I bought a Brother laser printer very similar to the two you posted at my last employer, and it worked a treat. We also had a cheapish inkjet in case we needed to print a high quality photo or something, but the bulk of the printing was done on the laser.
I have to say that laser is the way to go for speed and ink efficiency, but definitely look at aftermarket cartridges as authentic laser ones are super expensive (the 3rd party ones I found here in Aus were like 1/5 the cost and the prints were still the same quality).
The only downside I can think of is that it was quite loud.