There are good choices for P-40s. Hasegawa does make a 1/32 scale P-40E: not cheap but a better kit than the Revell. Hasegawa also makes a P-40L and P-40N in 1/48 - no doubt both fine kits because Hasegawa doesn't make many bad ones but not bargains. Italeri reboxed the well regarded AMT 1/48 version of the P-40N. Solid kit with a good variety of new decals for about $20. (The decals are needed because so many countries flew the plane.)
If you're looking for a sweet 1943 era plane, it would be hard to miss with Tamiya's F4U-1A Corsair. It was one of those late 90s Tamiya products that are of very high quality and sells for not much more than $20. As far as history goes, it was the mount of the fierce USN and Marine land based fighter squadrons up to their nose in combat in the drive toward Rabaul: Jolly Rogers, Black Sheep etc. These were the gents that killed off a very high % of Japan's veteran pilots in 43, paving the way for the aerial muggings delivered by the Hellcats in 1944. It was really the Corsair's moment in the spotlight during WWII. The Navy put the more docile and "junior birdman" friendly Hellcats on the carriers (really a 1944 plane) so once Rabaul was bypassed the Corsairs didn't have much to do until 1945 when the USN decided that a very fast fighter would be useful against Kamikazes and put some on CVs. (The Brits were delighted to get Corsairs and they were widely deployed on RN CVs.) Once in the air the Corsair was a much better aircraft than the Hellcat which is why after the war Corsairs steadily replaced Hellcats as carrier based strike planes and were heavily engaged in Korea. Anyway, a very distinguished aircraft and a very sweet model.
Get something into the GB regardless.
Eric