In a big, important series like this, whether or not they're headed overseas should count for next to nothing. This isn't about building for the future, it's about beating the Lions. We should pick the best team possible from all those that are available. Players become unavailable when they're playing overseas and that's the way it should be... but ONLY when they're overseas, not while they're still here and contributing to NZ rugby.
I think it's obvious that Cruden and Faumuiina will be selected. They are both big assets. TKB is also a near lock-in, he's an established squad member and definitely deserves his spot based on this year's form. I personally think that Luatua and Lowe deserve to be there too, but that comes down to opinion. Luatua is in a real tight battle there with a number of guys (who all probably deserve it) but I think he offers the most. I'm sure Lowe won't be picked, but by God he is good enough.