Welp, for those who goto to Costco stores...
This week, at least in the Seattle area, Buy-1 get-1 +r or -r printable TDK spindles. $42.99 per spindle, so after coupon its $0.215 each. Many stores have the coupon at checkout so don't worry if you dont' have a coupon.... you can always say, "Rats, I forgot my coupon" and hope the sales person will give you the discount.
I've been using the +R TDK's without issue using a Plextor 8x, or two different 16x NEC burners.
Word of note if doing direct printing on DVD's... get a can of satin clear coat from the hardware store and spray them after printing. My Canon IP4000's ink (OEM) will smear even after it dries... so i've been printing batches and clear coating them...really nice.
EDIT: Forgot to mention that these are NOT coated to the hub for printing.... but thats fine with me.