I am afraid to suggest any good designers as per 'cryptodevil's warning. Do you mind put your reward money into escrow for this graphics designing works at least.
I believe you in rush with your project, but you need to fulfill this forum's requirements side by side, other wise you may need to loose the success of your projects even they are legit.
Cryptodevil is about 7 more subscribers away from being debunked and forced to revise his rating or risk his own credibility. As per the Twitter campaign we have paid 23 users in advance.
I recommend Angelos Santos he is great in graphic design like logo,banner,video graphics and more.Just contact him to see his portfolio.If web designing I can do the work for you.
Angelo Santos is already one of our designers. He has done our logo and is working on another project as we speak.