Tell me about the latest anti-hypertensive drug.?

A few years back, I was detected with hypertension. The doctor prescribed a light dose of Stamlodipine with Atenolol. After continuing for sometime, I had reduced it to only Atenolol. A couple of years back, another doctor changed it to Bisoprolol. Please tell me, what should I select as a change this time ? Please consider the cost part also.