Get a second hand Blizzard 1230 board in stead. That way you have the possiblity to add SCSI controller later on, install a 128 MB ram module and your Amiga will be quite a bit faster than it is now.
The Blizzard board has more features than the Elbox card, and it runs fine in a desktop A1200. Chances are that you might be able to find a Blizzard 1230 for the price of the Elbox card.