Hi - I also take Bystolic (5mg) and am very satisfied with the results, even though my systolic pressure is rarely the recommended 120. I have never had problems with driving, etc., no edema; in fact, I haven't had any side effects so far (taking it since July, 2008). I say 'so far' because apparently side effects can appear at any time. I also take enalapril and HCTZ. Bystolic is supposed to lower your diastolic pressure and pulse and has done that for me, so it surprises me that you said your diastolic reading was 90. I don't know anything about the other drug you mentioned. If you've given Bystolic a real chance, and it still makes you feel tired, etc., then, of course, you should switch to another drug. good luck!
Ace - glad Bystolic is working for you again! It's not perfect, but at least I feel normal, and I've decided that I'd rather feel good than have the 120/80 recommended blood pressure reading all day! My doctor even agrees with me!

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