Cisco HA Firewall Replacement (Downtown New York City)

We are a small business in downtown NYC and have a pair of ASA5510 firewalls in high availability that need to be replaced due to end of support on 9/30/18. We need someone to recommend the appropriate model, upgrade the existing code and install the new firewalls. We're also interested in features like web protection, intrusion detection and real time alerts/monitoring. While remote configuration of the new hardware is ok, we'd like someone onsite on a Friday night for installation as well as the following Monday morning for an hour at the beginning of our business day.