Some extra info for lurkers:
Yes, the I226-V is working with ASPM turned off, but if you turn ASPM on the system will freeze after some time.
If you do not care about higher energy consumption, go for it.
See this post for more info.
EDIT:
I got another i226-T1 with i226-V controller.
This time one with one ethernet port instead of two.
The card ran without problems for 2,5 days straight by now, even with powertop --auto-tune and activated ASPM.
I recognized no problems or slow speeds, but it has only been 2,5 days.
I will update in a few weeks.
EDIT 2:
yep, still working perfectly after some weeks