This is a look at the competition research in Market Samurai for your keyword. It looks like you're up against some pretty heavy authority sites. This might be a bit of a challenge. Most of them have a domain age of 10+ years.
Each of them has a pretty hefty number of backlinks to the domain, and a large number of pages in the google index. When you have a very large site, you have the opportunity to do some interesting things with page rank sculpting that can push pr to your home page, your category pages or even your deep product or review pages. I don't know how large your friend's site is, but the ones he's going up against are pretty large. Most of the sites are in the DMOZ directory and several are in the Yahoo directory.
However, when looking at the BLP, or backlinks to the page column, it appears you might have some opportunities there. None of the pages shown have more than 35 backlinks to the ranking page.
I see you've mentioned some social bookmarking and a video? Have you written any reviews of this model? Where did you post them? Have you posted any articles to ezinearticles or goarticles? Did you create any hubpages? How about a squidoo lens? Have you put an article on scribd that links back to you? How about a UAW Submission? Done any blog commenting? How about social profile creation? Have you submitted a video to youtube? Notice 2 of the top 10 are youtube videos.
There are exceptions, but as a general rule, ranking is a numbers game. The oldest site, with the most pages, with the most links wins. If you can't be older, be bigger, if you can't be bigger. . . get more links.
I guess my point is. . You have to do more than your competitors. If they have 150 backlinks. . . you need more. How many more? The answer to that is ALWAYS . . . As many as it takes.
Good Luck to you. Don't give up. I'm in a very competitive market where most of the sites are 10+ years old. In the last 2 years, a "new guy" has popped up and surprised all of us. Why? because he's been consistently building good links. We've had to re-evaluate our efforts and take a little closer look at what we've been doing. If this new guy can come in my market and be competitive, then with the right effort in your market, so can you.
Niksa