The answer to this question is that woman who have not had a baby but have just stretched their skin out with weight gain and subsequent loss rarely benefit from tightening the muscles during a tummy tuck or abdominoplasty.  Conversely, women who have had at least one full term pregnancy always have some stretching of the ligament between the rectus muscles or a small amount of diastasis recti, not matter how strong or tight their rectus muscles are.  Therefore, these women will always benefit from a muscle repair, especially as they get older and the abdomen tends to naturally round out.
The photos show that you would have an excellent result from a tummy tuck.  It is hard to know if you would need liposuction in conjunction with a tummy tuck without seeing you.  Most plastic surgeons will use some liposuction as a regular part of the surgery to help obtain the best body contouring possible at the time of the surgery.  It is simply part of the surgical procedure for a tummy tuck and a tool that should be used for this surgery just like a scalpel is.
Make sure you seek out a plastic surgeon who is certified by the American Board of Plastic Surgeons and even better, a member of the American Society for Aesthetic Plastic Surgeons in order to be assured you are in the best possible hands.  I would also recommend that you seek out a surgeon who does a No Drain, no narcotics, 24-hour rapid recovery technique to minimize your recovery time and post-operative complications.