I am a NWA Platinum Elite and and planning to fly SFO-DEL-SFO this winter. I have 6 upgrade coupons which can be used only if i buy a Y/M/B fare. I do have enough miles in my account to fly FC.

My question is which is the best option?

1. Buy Y/M/B fare and use the upgrade coupon
2. Use miles

I know buying and then getting the upgrade will be expensive. So i just wanted to get an advice as to what fellow FT's think?

Thanks