Perhaps the 'enhanced t/o speeds' you refer to are also known as 'improved climb procedures' ?
What does your airline use for the MCP speed setting during pre-flight set-up? I would suggest you follow that, as it is your airlines' S.O.P.. If you use V2 + 10 as a pre-flight speed, then you run the risk of climbing out at v2 + 10 following an engine failure after V1, which is not the correct speed. If you need to climb out at V2 + 10, it is displayed on the FMC.