Hi, I apologise if my question has been asked a thousand times before or is a very difficult one to answer. I have an e-commerce website and last year invested approx £3000 in PPC via adwords with good success. I am looking to go with SEO and am being quoted approx £500 per month for 6 months to achieve a top 5 ranking. So I am faced with an investment appraisal of which £3k will harvest the greatest rewards. I know many people seem to advocate a mixture of the 2 but that will take my spend to more than the £3k i have budgeted. So is there a simple rule of thumb calculation that deomstrates the qty of clicks if ranked in the top 5 versus PPC if you were in the top 5 of the sponsored links? Anybodys help on this issue will be hugely appreciated.