My old HP Laserjet+ was all of 300 DPI and did just fine for clear printing. That unit is now 14+ years old and still running.
Take no offense in that I think you are overanalysing. If I was to buy a laser in the next 20 minutes, I'd head to the office deport or such and pick up a HP laserprinter 1000 or 1200.
I am a student looking to buy a laser printer. I do quite a bit of printing (my profs pdf notes, papers, homework assignments, readings, etc.). I don't do a lot of graphics printing, but I would like diagrams and the pictures I do print to come out clear. I have been reading a lot of the reviews here on CNet and I am still a little puzzled. How important is PCL6 and the other emulations (IBM ProPrinter, EPSON) (I don't really understand what they are either). I have been looking at the Samsung Ml-1740 and 1750. The 1750 has a faster CPU and a better DPI. Will the higher DPI make a big difference on text? The CPU won't make much of a difference will it? Will I benefit from the emulations tha the Ml-1750 has (PCL6, IBM ProPrinter, EPSON)?
Sorry about all the questions in the post