Well I believe there's no comparison between Organic free search ranking and PPC .

Yes with PPC you can get immediate results but for long term solution its always recommended to have free search rankings

PPC showing ads is country specific but free ranking is global and you get rankings on all country googles

So I suggest to focus on both . Also all business website are not covered under PPC like http://www.webprecision.net you can't have ppc ads.

If you are looking and searching for free organic search company try out http://www.seo-services-india.com or http://www.webproindia.com.