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Sorry, saw the follow-up, but I think the overall thread has you covered. The only real issue with CMS URLs is that you can sometimes have multiple versions pointing to the same page, and this creates duplicate content. There are plug-ins for WordPress that can help with that. The only exception would be something like an AJAX-style URL, where the page content could change without the URL ever changing (Flash has the same issue, for example). You'll rarely see that in a standard CMS, though, and definitely not in WordPress.

Thank you two for the answers but I didn't realize one simple thing. The google adword tool is mainly for well....Adwords. The keywords are probably highly competitive in terms of CPC and the number of people vying for them. I was doing organic ranking research. This is why I was confused as to why the keywords were "highly competitive" but an opensite analysis of the top 10 would show that they had very little page authority or good if at all backlinks. The sites that would show up would be the manufactorers or an ebay page or something like that!