It seems you are on the right path as far as not losing the traffic that you have spent a year gathering. But remember one of the most important things is keep the links relevant from page to page.
This may mean you need to double your content (an article or post from the old site to relevant but different content on the new) be sure not to duplicate it word for word and it should help.
What I mean is make sure that your links from the old page go to relevant new pages don't link just for the sake of linking to the new site. Google may view this as a bad thing.
You will also still need to begin a fresh SEO campaign for your new site. One that will establish it's on credibility and
PR. I am sure you know the value of linking and establishing quality links can boost you
PR quickly. As far as transferring the established
PR to a new domain I don't know of anyway that this can be done for a fact. There are many theories on that topic, but to be safe begin an aggressive SEO-SEM plan with the focus of creating independent
PR.