An upgrade question

VS are offering me the chance to upgrade my Boston flights from PE to UC for 341 each way.
Can't justify UC both ways, so I'm wondering...
If I upgrade the outbound, I get to use the LHR Clubhouse and of course a great way to start a holiday with drinks in the bar on board etc.
If I upgrade the inbound then of course I get to use the bed as it's an overnight flight, but then it is only about 6 1/2 hours. The Boston Clubhouse looks great but clearly not as nice as LHR... and of course while PE looks very comfortable for the inbound flight, maybe we should end the holiday on a 'high', and can use Revivals at LHR.
Also, if I do upgrade, what two seats would be recommended, remembering Matt can be a bit nervous?
What would you do?
Can't justify UC both ways, so I'm wondering...
If I upgrade the outbound, I get to use the LHR Clubhouse and of course a great way to start a holiday with drinks in the bar on board etc.
If I upgrade the inbound then of course I get to use the bed as it's an overnight flight, but then it is only about 6 1/2 hours. The Boston Clubhouse looks great but clearly not as nice as LHR... and of course while PE looks very comfortable for the inbound flight, maybe we should end the holiday on a 'high', and can use Revivals at LHR.
Also, if I do upgrade, what two seats would be recommended, remembering Matt can be a bit nervous?
What would you do?