Excited--booked our first UC trip upgrade!

Initially when I joined here my partner and I were saving for a full air mile redemption on a round trip to Tokyo, but having read everyone extolling the virtues of the M Class upgrade we decided in the end to opt for that instead. That means that in a few short months we'll be heading to Tokyo in UC! Changing the dates slightly also meant that we saved an extra £400, almost, which brought our overall saving to around £4000 (versus buying the cheapest available UC fares outright). Thanks to everyone at V-Flyer for all the valuable information I've learned along the way, it would not have been possible without you
We're extremely excited. Now I'm trying to figure out the best seats for us on the most likely aircraft (the Airbus 340-600). I have a few ideas from looking online, but would love your suggestions.
For anyone else looking, availability for roundtrip upgrades from LHR > NRT still seems to be excellent as we had many dates available to us, which is great for redemptions but also a little worrying; I do hope it's a reasonably profitable route for them.

For anyone else looking, availability for roundtrip upgrades from LHR > NRT still seems to be excellent as we had many dates available to us, which is great for redemptions but also a little worrying; I do hope it's a reasonably profitable route for them.