a toss-up between (two things)

A situation in which the outcome cannot be predicted or a decision between two things is very close. If you ask me, it's a real toss-up between both teams. They've both done so well this season that it's hard to predict who will win. Well, it's a toss-up between taking the entry level position or going back to school. What do you think I should do? It's a toss-up between Amanda and Caroline for me—they're both exceptional candidates for the job.