Dark sunset photo pp help?

I have taken a photo of a couple friends that I liked, at least on screen. My attempts at printing it so far have ended up too dark, and as this is costing a fair bit to get blown up each time I would like some advice on what I should do before getting another print made.

The photo was taken just after sunset... in hindsight I think I should have taken the image from a lower angle so that there was a true silhouette, but given that this is what I have to work with how can I make this photo 'work'?

First picture is the original from the camera, second is the one I had printed after just adjusting the raw to make it a bit brighter. The last one I haven't had printed yet but I tweaked the contrast for the bottom half only, is this going in the right direction?

Any other advice is also welcome to improve the image. I was intending it to be a gift to one of the people in it, do you think this photo is (or could be made to be) of enough quality to be a good present?

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This is the 3rd picture. I haven't tried printing this one yet.

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I think your problem might be in the monitor calibration.
Make sure it's fine tuned.

Also consider using the darkness of the first picture's sky and maybe something between the the lightness of the second and third's water.

You could make two images; one lighter for foreground and one darker for sky and combine as layers, which is what I have done here.

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thanks for the feedback.

And0, your right, i'm doing all this on an un-calibrated notebook lcd... (yes, i know).

Biko, thanks for the tip. for some reason I just hadn't connected the dots there yet. I'll try another print on monday using the 'split' approach.

i personally like the 3rd one alot. the light reflected on the sand adds to it.

In the interests of being complete I have attached the finalised version. If anyone is interested, I ended up using 3 layers.
The first layer was for the actual sunset, this was pretty much 'as shot' with auto exposure etc on the raw importer used.
The second layer was as suggested a much higer exposure, on my screen it actually looks overexposed but when printed it looks about right.
The 3rd layer was because I decided the moon would look better bigger, so i blew it up 3 times aah the joys of pp.

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Blowing up the moon was definitely a right decision, IMO.

I'd also suggest straightening the horizon and cropping out a bit of the foreground so you get the horizon down closer to the 1/3 line.