Gig Throughput on IPSEC

Hi, I have a requirement to encrypt data using IPSEC over a p-t-p gig fibre link.  In the past I've normally used Juniper to terminate VPNs, as I have found them excellent devices and the route based VPN functionality very useful.  However looking at their range, only the ISG will do a gig of IPSEC.  I'm leaning towards keeping my exising Juniper SSG550's for firewall/routing capability at each site.  Then having a separate encryption devices to handle the site-to-site vpn requiring the gig throughput.  Does anyone have any suggestions on devices to use?   Adel