I like the second image alot more revup, maybe its the monochrome
I rarely use photomatix these days but every once in a while i got back to it to play around
I have found that avoiding the temptation to push the strength slider too high has a big impact on how real the scene looks. I try to stay below strength 70
I also find night shots and urban shots can sustain higher strength values before they get to oh my god my eyes are bleeding levels.
I find photomatix automatically oversaturates and outright alters the colours and there is nothing you can do about it. Its too hard to fix this un natural colour shifting afterwards
If you are interested in HDR have a look at this methodhttp://goodlight.us