I'd suggest adding the B17F.  No need for the E.  It just didn't show up enough.  Yeah it flew the first mission but the F and G were the work horses.  Same applies to the B24D.  Not worth the effort I wouldn't think. Better off adding an OD/Gray H model B24 which wouldn't really be anything different then changing the skin on the silver Js.
Might consider adding a Halifax.  Lanc's and Halifaxs flying daylight raids in the summer of 44 on.  With the Spits, and RAF flown Mustang IIIs and IVs, that might add some fun.  A bomber version of the Mossie as well without the guns.
Me410 and a gunned nosed Ju88G for those poor nightfighter guys who had to go out in daylight on occasion to hit the bombers.
And yeah I know there appears to be an aversion to the B25 but the RAF was using them alongside the Bostons on those cross channel raids by 2 Group escorted by all those Spits.  A B25C/D would fit kinda nice that way.  No not a solid nose gunned version, just your plain old glass nosed bomber version.
And it might be kinda nice to have a remodeled car door Tiffie for those pre-D-Day times when the Tiffies were also escorting those raids across the channel.
Hey I can dream can't I? 
