I am sure the FAS 3050 is a fine solution and yes, FlexVols are cool, but NFS on Linux is nowhere near as bad as you make it out to be.
On current distributions (SuSE SLES9 - which has the better Linux NFS - and RHEL) both UDP and TCP are supported and work just fine. There was some trouble with older 2.4 Linux kernels with TCP, but that's long since fixed. rsize and wsize up to 32768 is also supported on both UDP and TCP, at least on SuSE Linux. And Jumbo frames work just fine on Linux NFS, as some of our benchmarks show (we have now gotten over 2,000 Megabytes (not Megabits) per second over NFS from a single Linux file system, read and write, using iozone). That's using a cluster file system to mount and export the same file system from multiple Linux nodes concurrently.
Could you please specify how many Linux nodes were involved, their hardware specs and the disk configuration used (SAN array, cache, disk size/ speed, use of snapshots active quotas etc.) that were used to generate those benchmarks?
Any particular reason they haven't been submitted to Spec?
Regards, Max