Hi r/sysadmin, any recommendations for ADSL2 Modems?

They are to be rolled out to roughly 40-50 remote sites sitting in front of Aruba RAP-5WIN AP's. For those that may have had experience with a similar set up any recommendations are welcome. Alternatively just looking for consensus on quality to features.

So far what we think we are looking for is;

• Single port modem.
• Some firewall configuration.
• Reliability.
• Remote access.
• Low to mid price range.

Thanks in advance.