I'm looking for a printer that will print on DL AND duplex.  It can be
either laser or inkjet.

I prefer a price range AUD$400-$1000.

If the printer has a straight paper path, or can duplex in one pass
(does that exist?) I would be particularly keen to hear, as a straight
paper path means I can use thicker paper without jams.

(DL is an A4 folded in three - standard mail format for Australia).

Hi tocker-ga,
I did find printers that can duplex in one pass such as the OCE 3100 printer:
[URL: http://www.oce.com/en/Products/Printers-copiers-plotters/Black+and+white/Central+reproduction/3100/default.htm]

Looking at past eBay auctions, printers such as the OCE 3100 are quite
expensive(A little bit over $5,000 US)

However, I did find many printers that support Automatic Duplexing,
(most seem to have two trays)

HP Business Inkjet 1200D Printer w. Duplex
[Price: $335.80 AUD]
[Order Page: http://www.techbuy.com.au/products/45632/Printers_INKJET/HP/BIJ1200D(C8154A)/Business_Inkjet_1200D_Printer_w._Duplex.asp]

Canon PIXMA iP5000 USB/Direct Printer
[Price: $310.00 AUD]
[Order Page: http://www.techbuy.com.au/products/46048/Printers_INKJET/Canon/iP5000/PIXMA_iP5000_USB_Direct_Printer.asp]


Canon PIXMA iP600D USB/Direct Printer
[Price: $443.20 AUD]
[Order Page: http://www.techbuy.com.au/products/46417/Printers_INKJET/Canon/iP6000D/PIXMA_iP600D_USB_Direct_Printer.asp]

Canon PIXMA iP8500 USB/Direct Printer
[Price: $539.70 AUD]
[Order Page: http://www.techbuy.com.au/products/46418/Printers_INKJET/Canon/iP8500/PIXMA_iP8500_USB_Direct_Printer.asp]

I can't guarantee there won't be anymore paper jams but based on the
designs of these Duplex printers,
I'm inclined to go with Auto-Duplex printers which prints to the
bottom instead of to the top.

Please let me know if you have anymore questions.

Thank you very much.

-googleexpert

Hi
Thanks for the link on the OCE3100.  I expected there would be
something about - I've just never heard of it.  It's a bit pricey, but
maybe thats to be expected.  If I get no other answers, I will award
yours the winner.

Just to clarify on one point:
The normal printers will almost certainly have troubles with duplexing
because it is smaller paper, and the paper is going to be a different
weight.