Virgo wrote:The best thing one can do in my opinion is read the Visuddhimagga. It details the whole path. When one gets to the wisdom section one can supplement some of ones learning by learning some of the Abhidhamma. That is the best thing one can do in my opinion as far as study is concerned.
There is so much great information in the Commentaries. It is very valuable. But you could spend many years of a lifetime studying it. Study directly connected with the path is the best; that is why I recommend Visuddhimagga. It details just about everything one needs to know about the three aggregates of the path: sila, samadhi, and wisdom. Abhidhamma can help with the wisdom aspect, as much of the information in the text draws from it and teaches it. This is the most practical way to approach the path. If one is a monk, study of Vinaya is also very important. It is helpful even for a layman. Practical study is the most useful. Of course, it is important that some people study all the points and help preserve them so the legacy continuous on into the future. There is a sutta where the monks debate about what helps preserve the path-- whether it is practice of study. Both sides quote points that show their side is correct. Eventually it is decided that study helps preserve the path most because without proper study, there won't be proper practice, so the practice will be lost too.