I'll jump right into the thick of it:
SWFC
Although we like the simplicity and time/effort you've put in, but this is something which isn't best suited to replace our current header, sorry.
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Amaresh
Personally this is my favorite entry, one thing i do suggest changing in the yellow colors to better match our current sites yellow color scheme.
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lil_pat92
Good entry, but it just lacks quality.. i mean the font, fire effect, yellow cards are all basics and don't really suit each other to way you've designed them, sorry if that came of as pigheaded.
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Wnnrssnizzle
You certainly have some graphical skills! but we're looking for the header to hold 'familiar' football faces that fans within the UK can related to: e.g. John Terry, Frank Lampard, Ashley Cole, Joe Cole (yeah i support Chelsea)! But yeah.. famous footballers like Ronaldinho, Ronaldo, Zidane etc..
So perhaps put more 'faces' blended into the backgrounds like
Amaresh's for example.
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swfc990
Perhaps use a more 'stylish' font, and rework the borders of those yellow cards - as they blend into each other badly, we do like the overall header though.
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master-g
Just personally i really 'hate' that referee! But I'll try and keep that out of my head when we make the decision come Monday, but perhaps try blending some 'faces' into the background?
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Dtunam
I love it! but I'm really not sure what i can say for you to improve upon it, perhaps replace that Barcelona defender (I've forgot his name) with another worldclass footballer in a better pose? just a thought.
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ritwikr
The stadium blended into the background is an amazing effect! we're just not sure on the 'wayne rooney into a button' effect, and perhaps style the font bit better?
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nkoul_96
lol @ coca-cola font, but um.. the Italian player seems to look weird? what kind of effect are you using on it? my suggestion is to 'un-weird' him.. please don't take that as an ignorant suggestion.
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Minch
Firstly, could we see the two headers without the ray of lights? We really do like these, for are even thinking about rotating the header images.

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armaan
Im really sorry, this isn't what we are looking for, as it just lacks everything what everyone above has. Sorry again.
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Glen Toran
Very nice! the only suggestion i can make is to try out new 'faces' on the banner instead of the guy with a green shirt. (Sorry i don't know his name).
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diamen
Stunning effects! they truly are stunning... I'm just not sure if the right hand side of those will blend into our background though. Also the font seems fuzzy, perhaps try to enlarge it bit ?
My partner is the one who is usually gives criteria on stuff, as I'm not much of a writer (as you can probably tell). So I apologize now if anything i just said seems: rude, ignorant, lame, pointless etc...
BIG THANKS to everyone who has entered so far, and we look forward to seeing your 'reworks'.
If anyone would like more advanced criteria just say so, and I'll do my best.
Regards,
Dan