Offroading in Silver Lake C&C appreciated

I'm working off two different monitors at the moment. One is sharp but it's aging screen isn't as good with colors as it used to be, the other isn't high resolution at all. This made post processing a bit of a pain and as a result I think some of the colors could be off. Any help would be appreciated just so I have an idea at least of which to work on.

1. Just to settle the color/intensity issue
Done on Low res monitor

The first two seem a bit dark to me but the others are ok - but might need a bump in contrast. I really like the 4th shot with the sand flying back at the rider.
nice work.

Thanks for the comments. That 4th one gets me, I don't understand why I like it but I do. I really can't put a finger on it.

As for the first two, they were meant to be a bit dark - the sky and reflections were supposed to be light. I wanted there to be sort of pseudo silhouettes with the people against the sky which wouldn't have worked if I made the cars brighter.

I could try to brighten it a tad but the reason I put the two up there was so I would know if my laptop monitor is horribly dull with colors and contrast.

Nice series of shots you got here ,love the action .