If you are looking for reputable brands of wire:
Manufacturers:
Belden
Commscope
Genesis / Honeywell
Coleman Cable
Gepco / Sheer Wire
General Cable
Quality private label brands:
Liberty
Tributaries
Signature Wire
Windy City Wire
Ethereal
Beware of import and off brands as they may 1) cheat on braid coverage 2) say the product is one thing, but sell you something different 3) May not meet performance standards 4) non-standard dimensions may make connectorization difficult. 5) May not be UL rated for in-wall use or may feature a false UL marking. Obviously, they are not all crooks, but it is difficult for the average Joe to know the difference and typically the cheaper the wire, the more likely the quality of the product suffers.
The bare copper center may not be necessary depending on what you are doing. It is helpful to prevent voltage drop in powering up the dish - but is preferred for that reason only, not for performance. Copper-clad steel has many advantages over BC for durability, and this is why you will find mainly Copper-clad steel as a cable TV industry standard.
You may be able to find a good price (without shipping charges) at your local Home Center. I know Lowe's, Home Depot, and Menards all carry coax from some of the reputable brands listed above. If they don't have a BC version of the coax available, they can special order it for you - just ask. Shipping can really kill you on wire, so buying local really makes sense.
Hope this helps.
Carl