Welcome to FT, RTNJ12. The Biz seats will go from 57.5K to 70K and up in the saver category, one way. When are you looking to travel?

Here are just a few quick pointers: You can do a stop over and an open jaw on a UA award, so you might check award saver space into ARN (Stockholm), then to CDG and London. It's just as easy, or easier, to take the Eurostar from Paris to London as it is to fly, so that leg could be your open jaw. Also, transiting LHR can result in higher departure taxes than other places.

Check the hotel forums for Marriott redemption information. The 100K offer is a good one, but generally speaking, hotel points are not as valuable as airline miles. So 100K Marriott points are not equal to 100K UA or UR points. The exception to this are the SPG points, which are both hotel and transferable points.