Hi Peter
I was thinking about remaining cattle class for the outbound flight since it is a day flight, but then decided to go ahead and upgrade as it is a long flight - just over 11 hours.  Can't understand why the return flight is shorter.  Hopefully will be able to get some sleep on the way back!  Not too long to go - getting very excited.
Abba Dave - hope $358 will be well spent and much better than BA upgrade I did on my return from Mexico - it certainly was not worth the extra I paid.  I will let you know what I thought about the upgrade when we land in Houston!
Regards
Jaya