[drvladb]

The HP Prime, though pricy, supports a decent RPN mode. Definitely for a higher level of education (CAS, programs, all that fun stuff), but approved for a decent amount of US based exams.

[leejoramo]

Pricy is relative. Looks like Amazon sells it for $125 (the SRP is $230)

As an engineering student in 1987, I bought a HP-28C. I recall it was the first calculator to do symbolic math

Original Price $235 which is close to what I paid. Adjusted for inflation $657

I think it was worth it.