10 GbE for replication?

Hi!

We're building a DSS v6 iSCSI autofailover cluster. iSCSI initiators are connect via 2 x 1 GbE MPIO (or maybe more).

Is it a good idea for performance reasons to do the synchronous replication between the 2 DSS boxes via 10 GbE crossover link? I think if we have full load via 2 or more MPIO links to the target, it could be a bottleneck in replication, if there is only a single 1 GbE link ...