Firstly, Congrats on getting noticed and getting offered a contract, that's brilliant, 2ndly I would go for the 50% option, the company are going to have good contacts and links, and will be able to get more for your money, like a better studio engineer, for a better mastering service, CD and Vinyl Pressers for cheaper, so will be able to get more pressings for the money, and thirdly, Do it for the love, not the extra money...