We are looking to implement 10Gig ethernet for our ESX hosts and SANs. There are a number of solutions we have been looking at and it has really boiled down to what will give us the best bandwidth.
One solution was to run Intel X540-T2 cards with CAT6a to a Netgear XS712T switch.
The more I read into it the more favourable SFP+ becomes however, And with good availability of second hand switches like the Dell PowerConnect 8024F at a reasonable price point (<£2K GBP) that support stacking and low price difference in 10GBASE-T and 10GBASE-DA NICs it seems to make sense.
Does anyone have any direct experience with SFP+ and CAT6a/CAT7 cabling in a VMWare ESX environment and can offer advice?