I like the second moose image, it could fit better in your website, even if you decide to do merchandising it would look cool, and the name is more eye catching
Definitely go with the second one, The rectangular shape of the blinds isn't aeasthetically pleasing. For a website, or online banner(s) its great.
the first two are obviously more fun and i can see them working really well on an email campaign or on flyers perhaps, but i agree with your client, the last one works on more levels for me. Impressive work!