Juniper SRX-300 as an MPLS PE device?

We run our own mpl/L3vpn between a couple of datacentres in the UK, and a couple in the USA. For P/PE devices we are using Juniper MX80 routers.

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We have a couple of racks in Sydney and HK which we also want to link up to our core network (currently using s2s VPN's). We have a vpls circuit in sydney and HK, on top of which we can build our own mpls/l3vpn.

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Question is would an SRX300 be suitable for the job? The VPLS circuits are capped at 100mb anyway so i cant see throughput being an issue.

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Total amount of routes will be around 300. Any caveats in using an SRX full meshed into our mpls core?