Ignoring the suitability of that board for mining, it's about 3x the cost of the comparable DE0 board.

http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=139&No=593&PartNo=1

If you just want to buy something to learn with, I would go with the DE0.

BTW: neither of those are good for running the existing open source bitcoin miner.