IMO the F35 might be a better ground pounder than the Tranche 3 Typhoon, it has low observability design and (limited) stealth features (though some people seem to think it will be completely invisible and thus will trump any Eurocanard in Air to Air combat)
and a internal bomb bay meaning it will be be a far better 'first day of the war' interdiction platform.
It can carry Storm Shadows and LGBs externally and if we get JDAMS them it can carry a 2000 pounder internally.
I think Tranche 3 will not be bought, so many rumblings have being coming out of the MOD and the treasury about this over the last year. I think the JSF (perhaps with slight redesigns) will be procured as the manned element of the GR4 replacement while UCAVs (we have recently got involved with US over this) and cruise missiles will cover the rest.