Western Electric 10ga vs Dueland 16ga

16 gauge is fine for your system. The Duelund will simply sound more open, resolving and real.  The WE 10 gauge will be warmer and not as open or resolving. The WE bass is slower and not as fast and crisp.  You can try both for yourself in your own system to see which one is best for you. Both are very good indeed.  

I build and sell cables using both and have extensive knowledge of both. First, the Duelund wire sound more open, airy, lively and resolving. The WE wire is a tad darker sounding and warmer. 

I need to know now how long your speaker cables will be and the amp and speaker combo to give you some advice as to wire gauge.