Having just purchased a HP 2605dn colour laser printer, we bought the 3rd tray option, what a difference this has made, the ability to have two paper types available on command, be it plain or headed.
We also produce a small booklet double side print with a heavy weight paper front cover, this is now a dream to do, as the printer will collate inserting the cover automatically every 9 sheets, which is also double side printed.
Gone are the days of manually inserting a cover every so many sheets in the paper tray hoping that it does not miss-feed throwing everything out of sync. and no longer need to stand over the printer just in case it all goes wrong. Push the button and walk away! Bliss!.