It depends on your situation, but for the most part, you can get by with even the slowest home connection.
Here are the benefits:
- Lightning fast uploads (TBs per month)
- Doesn't slow down your home connection
- Limits home traffic (esp important for ISPs that have monthly traffic caps or charge by the gb)
- Added security from hackers & RIAA groups (esp with box in different country)
- Box you can use for other purposes (FTP files to work or friends, remote backup of data, stream music, etc)
- Immunity from tracker bans. Publicly giving invites away is against the rules on most sites
- Plus its just plain cool having a 100mb pipe at your disposal.... ;-)