Ok, so officially there are no drivers for this model on the Mac.
I got this email reply from my query...
Thank you for contacting EPSON e-mail support.
In reply to your email, the DX3800/DX3850 are not supported with Apple Mac
operating systems. For this reason there are no drivers available. You may want
to view the specifications for the DX4800/DX4850, which is compatible with Apple
Mac operating systems:
http://www.epson.co.uk/products/all_in_one_products/Stylus_DX4800.htm
Please be advised that the driver for the printer will need to be downloaded
from the link below:
http://www.epson.co.uk/support/download/
Unofficially, gutenprint works... but i dunno if there will be any faults, only time will tell for now...