If you want the absolute best digital version, buy the Shinkaiyaku 2017 from . Logos editions are fully tagged: every word is linked to Greek and Hebrew lexicons, and the PDF export feature generates perfect, searchable pages. This is the "better" option for serious exegetes. (Cost: ~¥3,000-5,000).
The official publisher of Shinkaiyaku 2017 is (いのちのことば社). They sell a licensed PDF version (for PC/tablet) as a downloadable product. shinkaiyaku 2017 pdf better