Because Attack of the Clones was shot entirely on early 1080p digital cameras, its "highest quality" version is unique:
As the story unfolds, Anakin and Obi-Wan embark on a mission to rescue Padmé, while also navigating their complicated relationships and confronting the looming threat of the separatist movement. Meanwhile, the clone troopers are introduced, marking a pivotal moment in the Star Wars universe.
If you are interested in the technical aspects of what constitutes a "high quality" version of this film, here are the details for the official remastered release:
Are there any free legal options? Maybe some services offer free trials. For example, Netflix might have it through a trial period. But I can't recommend signing up for a trial just for that. Alternatively, public libraries sometimes offer digital rental services through partnerships.
Meanwhile, the clone army is introduced, and the Republic's clone troopers are created to fight against the separatist droid army. The film features iconic characters such as Obi-Wan Kenobi, Mace Windu, and Yoda, as well as new characters like Jango Fett, the Mandalorian bounty hunter who serves as the template for the clone army.