Rog, I'm so sorry that went over your head, I'll be sure to have more consideration next time.
The 733's should be a safe bet for about the next 3-5 years, and the 757's possibly the next 5-10
I'd be disappointed if LS didn't at least consider the 738-SFP as an option out of GIB for the future. The aircraft won't be brimmed with fuel and if needs be they could block 20/30 seats on the return. It would still carry more than a 733.