Which shocks to buy?

I am wanting to buy new shocks for my coach a 2005 Fleetwood Expedition 34H Diesel pusher Cat C7 with XC Freightliner Chassis. I ordered shocks but the ones I got are the stock Sachs. I have been reading up on the shocks and they don't rate the stock shocks very well. I am going to take them back and either order Bilstein or Koni shocks. An artical I read rated the Bilstein a little better than the Koni and they are less money. Shock Article