Citi Platinum Amex - its a personal card that will earn you 3 Thank you points/$:

5 ThankYou Points for every $1 spent on purchases made at supermarkets, drug stores and gas stations and 3 ThankYou Points per $1 spent on all other purchases for the first 24 months

As you spend $30K/month so thats 90K TYP - which is good for a "fixed redemption" biz class USA ticket (up to $2700)

2 months spending = 180K TYP = biz class to europe, south america and australia (up to $5400)

Asia is 240K points (so a bit under 3 months spend) up to $7200 value.

I think this is the best for you - and there are threads here that explain alot more about the TYP program and how best to redeem these points.

The best thing is - its not restricted to award seat availability - if there are seats on the flight you want - you can book it. You even earn miles on the ticket, as it is a "paid ticket" rather than an award.

I think to qualify for Fixed redemption, you need to create a Expedia account and then link it to your Thank you account - do a search as there is a thread that explains exactly how to do this (I remember searching for it earlier this year)