Boy do I have an opening for you!
I normally don't like books with "Winning with..." in the title, but Winning With the Najdorf Sicilian has great reviews and is written for amateurs who can learn how to play the opening as well as learn new information about it. The book also has some information stronger players can benefit from as well. There are countless lines that lead to forced draws but also keep in mind that your opponents will not always play book. If they don't ask yourself what they're planning. Maybe they're hip on a novelty that you aren't (shame on you, Najdorf player, for not keeping current with critical theory! Databases are your friend) but also likely is they're out of book. Just carry on with your thematic plans, keeping d5 and sometimes b6 under control, and preparing counterattacks.
I think a 1500 Positional player will score 50% against a 1500 tactical player.
But I bet he would do much better against an 1100 tactical player.