Question: If a student of knowledge finishes memorizing the Quran, does he start with Saheehayn or does he start with the Matoon?
Shaikh: What Matoon?
Questioner: Like Usool ath-Thalatha and Umdat ul-Ahkam and other than it
Shaikh: “I see that he focuses on the books of Sunnah from the books written on this [subject]. As for the Saheehayn, then Yes, no doubt that they are important. However, as you know there are Ahaadith in Saheehayn that people do not need much, like [Ahaadith on] transactions and agriculture and other than it. So let him memorize after that, for example, Bulugh al-Maram or Umdatul Ahkam. Then after this, let him come to Tawheed and Aqeedah and the Matoon of Fiqh”.
[Taken from: http://shamela.ws/browse.php/book-7687/page-5873#page-6032%5D
Faisal Ibn Abdul Qaadir Ibn Hassan