[IC27A] Binnacle compass

[J]

I need to add a compass to my steering binnacle, there is currently no fixed 
mount compass aboard.  I am looking on line at a Rule industries Cruiser 
binnacle mount compass for about $100.  The only other option seems to be the 
Ritchie navigator for about $500 - 600. I know you usually get what you pay 
for, but that is a lot of money. Is anyone using the Rule compass and do you 
have an opinion regarding the quality and accuracy of same?  Thanks in advance.
Jeff