"etailer" looks the most trustworthy to me as well, but it also looks a little canned (it's too much uninspired "web 2.0" styling). It also has the least wasted space and a search box. The "Solitaire Cricket" banner looks a little out of place due to the choice of font and floral pattern.
"attempt" I find the most aesthetically pleasing overall, except the space part of the image looks out of place. The vapors surrounding the player work well with the cloud-like image above it. "attempt" also looks a little sparse in terms of content; a "products" list above the striker might fill the void.
I like the third website you listed. It seems easier to read ie, when you look at it your eyes just naturally flow from the header to the copy explaining who you are. Then the left where the links are lead you to where you may want to go next.