Thoughts?

I already have a pair of Focal Aria 906 bookshelf speakers and a Denon X3700.  I’m looking to start building a surround setup in my gameroom.  I don’t really have a place for the 906s other than this room, so if they’re not utilized here, then they’d either end up in storage or on the market. These are the options I’ve been tossing around:

1) buy stands for the 906s and use them as L/R, buy the matching Aria Center channel and add a sub.  Add surrounds and height speakers later on when budget allows (most cost effective option)

2) Buying a new pair of towers (sub $3000), adding a center and sub.  Adding rears at a later date.   

3) Buying open box Aria 926 towers at  below $3000, buying the matching center, and trying to incorporate the 906s as rears.  Also would have to buy a sub (least cost effective option)