Best Copy of On The Origin Of Species?
Although I have borrowed it before from the library I actually do not own a copy of Charles Darwins - On The Origin Of Species. Although this seems almost... sinful, I have not done so because I am looking for a copy of the first edition (not the first print run of 250 obviously). I have heard many people say this is the best version to get as later versions were altered to please people and I have even heard Richard Dawkins say it is the most scientific.
Any recommendations of a good first edition or best copy to get?
Thanks for any reply,