Blog site with price comparison section question

[darrenb]

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I'm about to start a niche type site with wordpress and intend to use the blog to generate natural traffic.
My question is regarding a price comparison section that i intend to add to the site, what would work best both in terms of site layout/design and seo:

1. Price comparison section as the main page with the blog as a separate sub section or even sub domain or

2. Blog as the main page / section of the site with the price comparison section as a sub section / domain.

Any advice appreciated....

[Cheapdvds]

blog , with a search bar in the corner for price comparison in a box or centred in the middle , all on the front page

[accelerator]

I say 2 because it's easier to generate traffic with the blog as the main page.