I don't train flat bench because I suck at it. I will return to it eventually though, not until after I am finished leaning out. Not sure of the carry over in strength from incline to flat. For what it is worth, my close grip bench IS flat, so it's possible I won't lose a lot of neural coordination on regular flat bench. I'm assuming that with some rededication to flat bench, I could get it up pretty high considering that my incline 5 RM is 315ish.
My ultimate plan right now is to get down as lean as I can so I know what my lower weight is, then work on rebuilding whatever strength I lost, if any, and refocus on the big three lifts. If I am really 16% at 250 starting out and I diet down without losing any muscle, which is unlikely, I would be like 225-230 when I get under 10% bodyfat. I'm guessing in reality I will end up around 210 @ 8% when I manage to get down that low. Perhaps 215 after a good refeed and a week or two at normal calories to stabilize. But even if I end up at 210, if I can still have the same maxes on deads, squats and bench that I have right now, that would be awesome.