Well I think I missed you today (sorry, you know what it's like, set alarm, hear alarm, grumble and shut alarm off!).
Well if you want to trade today (though I'm sure you're asleep and this isn't possible), then the 8:00 - 16:00 one.
If you want to trade tomorrow, it would have to be the late night : early morning one - travelling a couple of hundred miles tomorrow, so getting up early would be likely for me I think, plus I wouldn't have access to the internet until night.
For any other day, the 8:00 - 16:00 one sounds fine.
But I'll keep trying to check around both times to see if you're online anyway.