Spark Plugs- NT

I have read that the BKR5E-11 (one range hotter than stock) is the best for NT cars. But I have also read that you should stay with the BKR6E-11 (stock plugs).

What do you think is the best for our NT?
If I am going to be doing a lot of short drives, and a lot of stop and go traffic should I go with the hotter plugs?
Do mods make a difference when choseing plugs?

Thanks In Advanced :)

I have read that the BKR5E-11 (one range hotter than stock) is the best for NT cars. But I have also read that you should stay with the BKR6E-11 (stock plugs).

What do you think is the best for our NT?
If I am going to be doing a lot of short drives, and a lot of stop and go traffic should I go with the hotter plugs?
Do mods make a difference when choseing plugs?

Thanks In Advanced :)

I run the 5E-11s gapped @0.050 and get about 28 mpg when I drive it nicely. That is a mixture of highway and city driving. I did not really see much of an improvement when I switched, but I changed over a week after I bought my DSM so I have nothing to compare it to. I stick to them and change them every oil change just to keep fresh plugs in there.