As far as I can see:
This DAC Cable is not Supportet for the MSA (look in MSA QuickSpec).
The Switch can do only 1GB (is it right)? If so you can not use 10GB DAC Cable.
Use an 10GB Switch 59xx.
I prefer 6 SAS Disks, so you can configure 2 Disk Pools (one per Controller).
The MSA2041 will have a lot of Power for 4 ESX Server, but not with 1GB iSCSI.