There are certainly a lot of opinions as to what the best breast implant is to get a natural look and reduce the risk for rupture and therefore further surgery.  From your question, I believe that you want a natural feeling and looking breast augmentation and you are looking for a implant that will reduce of having a problem and having to redo your breast augmentation in the future.  You have been considering the Ideal Implant.
Let’s take a look at the science and throw out the opinion.  Considering at the core study data, the Ideal implant is a saline implant that is prone to rupture at a rate of 4.7% for all breast augmentation procedures.  These implants also have a capsule contracture rate of 11.5%.  While the ideal implant study does not look at surgery to address animation or muscle flexion deformity, many smooth implants are placed below the muscle to avoid capsule contracture and as a result there is a moderately high likelihood of that happening if you have the Ideal implant placed below the muscle.
The numbers for a problems with Allergan and Mentor silicone breast implants are clearly not as good as the numbers for the Ideal implant in terms of complications in the core studies.  However, the numbers are much higher with the Ideal implant as compared to Sientra implants.
Sientra’s highly cohesive or gummy bear implants have the lowest rupture rate of all implants at 2.5% and ruptures are almost inconsequential since these are implants are gummy bear or highly cohesive and the silicone gel will not “leak”.  The capsule contracture rate has been reported as high as 6% with Sientra’s complete implant line and drops to below 4% with their textured breast implants.  In addition, the textured implants can be placed above the muscle to avoid the muscle flexion deformity I mentioned and having to cut the muscle which reduces your pectoralis strength (no one talks about this).