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I would log into your chase account and goto the UR section where you can see what travel partners they have. You also should decide where you want to go because 100k UR points can get you to variety of places. I am pretty sure you can fly RT business to asia for less than 100k for example.
Once you decide where you want to go then you can find out how many points it would take from each of the partner airlines with UR program, and find the one with least amount of points or the airline you would like to fly. For me I am probably saving up for use with SQ business class, it takes more points but i want to fly sq once and try it out .
Also btw i would never use 100k UR points for cash , you could get an lot better value when you transfer it to airline partner, you could at least get double the value if you look around and are patient.