This

But personally I think it should be visually free of any links to dollar/gold etc. 

It needs to be crisp, sharp (so very nearly there IE ) and simple.  It has to grab the attention immediately and be unforgettable. 

Everyone knows what a dollar bill looks like ... even a "johnny foreigner" Englishman like me!  So it should be with Libertycoin.

Too many colours or words will make it look tacky, imo, and not stand out as much.  Silver, black and red look nice.  They won't outdate.

How about putting "XLB" on instead of "Libertycoin"?  After all, that is what it is and all the exchanges use it.  Maybe "libertycoin" around the edge and "XLB" next to the torch?