I use passtheLARE for Section 03 - they have a BOGO sale right now so you can buy both. If you have any vocabulary issues, their flashcards are really helpful too because it's already set up:
Pass the LARE: Practice Tests + Flashcards (Landscape Architect Registration Exam)LARE Prep is good for study guides, but SGLA will go more into depth. It honestly just depends on what you are looking for and how you learn. LARE ready is also out there, but I didn't enjoy their exams - they were unit based last time I took them, so I didn't find their formatting to be as helpful as the others discussed above.