Yes, I am set on the MC, or Discover, though I haven't seen much anything on Discover cards. I do about $500/mo at Sam's club-Unfortunately not Costco in NOLA- that I'm currently writing checks for since they take neither my AMEX nor Visa (non reward free card). I'm hoping to effectively replace as backup for when my AMEX is not accepted (which is currently only $30-50/mo)
Matt