Bottom line, you have all the right things going for you . . . and have clearly done the hard work to position yourself to be a competitive law school candidate. The last step is to do what it takes to do as well as possible on the LSAT. LivingLegend is spot on about the scores required. But also, you need to think about the money as well. You cannot change your GPA, but every point on your LSAT above 160 will affect your scholarship offers. Above 170 and you might be in the range of a full ride with your other factors. The numbers in play are the $250K COA (cost of attending) that you will pay for SMU and any other private law school. With that in mind, you should consider investing in the time and money for a rigorous LSAT prep course. I know they can cost up to $2K, but since you have a business degree, I shouldn't need to tell you what the rate of return of that investment could be if you can improve your scholarship and stipulation conditions (minimum 1st year grades required to retain scholarships into year 2 and 3).
Finally, I also agree with LL . . . PLEASE do not get wrapped totally up into SMU or bust. It is a perfectly fine law school (mediocre by most national standards, above average in Texas, but extraordinary in Dallas - FYI, I am originally from Dallas and taught at TTU, SMU, UH, and TWU). When it comes time to send applications, cast your net wide . . . You will be surprised at your opportunities.