Hi!
Color:Go for a light theme. These work much better by the majority of people. Also, the payment provider logos will embed better in your site. This because they also were made for light themed sites.
The purpose and naming of your site. This may be a bit of a shocker but bear with me.

When I read the name bitroad I immediately made the connection bitcoin and silkroad. And I must say that I did expect to enter a new online drugstore. What I'm saying is that piggy bagging on existing names doesn't always work. These things can backfire. Remember, many people in BTC-land are glad that the link Silkroad/BTC is severed because it gave BTC a bad name.
So my question to you is:
what kind of shop do you have or do you want to have. What should it communicate to the outside world? And did you position Bitcoin in the right place? With the last one I mean the following. You basically have a shop. It's great that you accept BTC and LTC. But does that mean that these should be in the name/theme of the shop?
I would suggest that you think of your own and unique identity. A mark so unique that it will be a a hallmark in the BTC/LTC community. How do you do that? Simple. By delivering top products, at top prices and with top service. The fact that you accept BTC/LTC will help tremendously as the BTC/LTC community welcome's every new addition to BTC.
As for information to your clients. I assume that you buy products in using fiat currency? Maybe you can play with the exchange rates between dollars (or euro's for that matter) and BTC/LTC. When you inform your clients of the current rate you show them that your prices follow the exchange rates closely and thus the products won't be overpriced when BTC is worth more then it did at the moment the product was bought in by you. Also in the event a coin would become worth less you could hold on to the original exchange rate and create a BTC-discount for a while. Nice for products that aren't selling that well and your clients will love that because this illustrates your commitment to BTC/LTC.
It does this more than a name and a logo with coins...
My 50
BTCcts
TFK