I want to do a 301 from a PR4 finance site to a new bargains/shopping site. I'm going to migrate the whole site over so that every page from the old site matches with the new site when I do the 301. Are these niches similar enough to do a 301 as if I'm changing the name of my site? Or will G not like the niche switch? Some of you guys have a lot of experience with 301s and I'd really appreciate some input on this.