For the MBOX to PST conversion, I also recommend A2Z Migrations for Thunderbird to Outlook. By these two in one solution you can easily migrate the Thunderbird and the MBOX file data to Outlook PST in few easy steps.
It provides a different and simple interface to others and allows two best options (Browse or Auto-Load) to add single or multiple Thunderbird or MBOX files. Once the file(s) will be uploaded it also gives a preview of all items with the attachments. From where you can export the selected items or files easily into PST, MSG, EML, HTML, RTF, etc formats.

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