Just wondering about working Xenserver/ReadyNAS setups

I have a small, 2 server XenServer 6.1 pool and a ReadyNAS 2100v2 serving as shared storage via iSCSI. The two NAS NICs are teamed with LACP, and the NAS has four 7200 RPM SATA hard drives in XRAID2. Granted, I have fewer than 10 VMs, but it works. I am looking to upgrade pieces of this setup while hoping to keep the NAS. I might upgrade the hard drives to SSDs or Western Digital Velociraptor's, and maybe change the teaming method of the NICs, and maybe switch to NFS shared storage instead of iSCSI, to test if I get more throughput.

Anyone else care to post your Xenserver/ReadyNAS setup? I would love to learn how other setups differ from mine and your take on your setup's performance.