what HDR software do you recommend.

Just been looking on another forum ( software ) as been stuck in the office for the past month after rupturing my knee. I know a lot of us are a bit purist when it comes to the colours and tones from are s1,s2,s3 and s5's but what HDR software if any would you recommend. I was a bit of a part time military photographer in a past life and have many grafic images from Iraq and numerous other places that would seem more punchy with a bit of HDR treatment ( from a single raw image I might add). Topaz caught my eye amongst the topics. Any comments? cheers