S65 ignition coil options

[E90_M3Ross]

Looking online on places like Autodoc, ebay, etc the range of ignition coils available appear to be brands I've not really heard of, so was wondering if I could hear the collective's thoughts. Now, I assume these are things you want a decent quality, considering what they do, but would there be much difference between ones?

For example

Japko - https://www.onlinecarparts.co.uk/japko-18999362.ht...
NTY - https://www.buycarparts.co.uk/nty/14673294#Ignitio...
Bosch - https://www.ebay.co.uk/itm/114726916757?fits=Car+M...

Ones from brands like NGK or Bosch appear to be out of stock everywhere aside ebay (see price!!!!) and ebay have OEM ones....for £210.... EACH! I am waiting diagnostics back but believe I have a faulty coil pack. If they are £200 each then I shall not be replacing all of them, but if the others for £40-50 are perfectly suitable, then I may as well do all 8 for peace of mind.

Thoughts?

Thanks.

[Max Maxasson]

I'd be wary of fitting non oem coil packs.
They form part of the ion sensing anti knock system.
Some folk who have fitted non oem packs have had trouble with them.

[E90_M3Ross]

Max Maxasson said:

I'd be wary of fitting non oem coil packs.
They form part of the ion sensing anti knock system.
Some folk who have fitted non oem packs have had trouble with them.

Thanks. I suspect Bosch ones would be alright, but they're basically the same cost. Not a bad bill to replace just one, but to replace all 8......