Watchguards vs Junipers firewalls

Hi all - Has anyone out there had experience of running these firewalls near 1Gig speeds (mainly middle to large packets, not voice) between zones/ports, if possible Specifically we are looking at the Watchguard XTM535 and the Juniper SRX550/600's. I am interested in experiences good and bad on either platforms and usage of IDP/Weblocker etc on them. We currently use SRX240 and Watchguard 1250e but have a need to increase the throughput to nearly 1Gig. Other criteria would be to be to do OSPF/BGP in high availability mode Many thanks Simon