A few quick ones i made

[Surfing Spartan]

and some very quick ones

very quick but i think it looks alright

and with a border

[zimmer92]

i like the first one and 3rd one. the second one just doesnt look right. the 4th one looks too pixelated and bright and the text is not right. the 2 last ones arent bad, just try and blend the render in a bit more on every single one. your current one has bits of blue which look out of place, such as on the left where your text is. also make the text less penetrating and blend it in to the bg.