I have a lower back problem and my normal chair is not helping.
Your best bet would be to go to your local retail outlet and test-drive the chairs they have there. Everybody is different and what works for one person may not work for another. I get lower back pain, too. I have found that pricey executive chairs tend to start hurting after only 45 minutes while I can sit in a cheap task chair for hours before getting sore. On the occasions I have to sit in a high-back executive chair I usually roll a jacket or towel up and put it behind my lower back. It helps.
