I think if I had to choose one to fight the last six months of the war, it would be a toss-up among the A-26 Invader, the Ju 188, and the Tu-2. Now for the record, the Pe-2 was a good plane too, and I think the Do 217 was fairly effective, at least when it first came out, the A-20 was serious business in 1942, the Ju 88 couldn't be kept down, the Mosquito too, but then, some might argue whether it was truly a medium. I would like to know more about the operational record of the PY1 Frances and also the LeO 451, which seem to have made a good account for themselves considering the formidable circumstances they faced. One thing to keep in mind is the rapid changing pace of technology and A/C development. Consider not how a plane was in the context of the whole war, but rather in the context of the part of the war it served in. The PZL P.37 Los was an excellent bomber for 1939, and had there been enough of them available, it might have done some serious damage to Germany. Amazingly, it carried a heavier bombload (some 5,000 lbs) in 1939 than most mediums carried in 1945. Another one I'd like to know more about is the Yer-2 from Russia, a twin-engine bomber with a range of over 3,000 miles. . . .