Hello, recently I’ve been working on putting together a system for a friend who does a lot in audio production and music on her computer. Shes been in need of a new system for a while so I offered to help. I’ve got just about everything somewhat nailed down, but as I don’t do much audio work myself, I don’t know if she would need any additional sound card or external thing. Are they worth it? And are there any good but not overly expensive headphones that are still of good quality for under $100? And finally, what kind of storage setup would be suitable for mass storage of music and audio files? (4tb?)Thanks, and happy Christmas everyone!