You could try the Battle of Britain 2 flight sim, as even though it's a flight sim, it can also be played as a Non-flying campaign where you are a controller, so you can direct the Battle of Britain RAF defence, or the Luftwaffe's attack. And it's fairly cheap to get hold of. Not exactly what you are looking for, but cheap, so maybe worth a look.
Also not quite along the exact lines of what you want, but still great fun in a manner similar to the battles part of TW, is Combat Mission, which if you've never tried it is a turn-based WW2 battle scenario game very much like traditional military wargaming in effect, but with computer graphics. There are lots of scenarios for it available and it's great on multiplayer if you know someone with similar interests who can fight you as a human opponent online. Kind of like a great game of chess with high explosives!
If you can find a copy, the old Fighting Steel is also a similar thing to Combat Mission with WW2 battleships fighting it out, although not turn based. Graphics are somewhat dated now, so if eye candy is a must, you won't like it, but it's still a good game and it does run on XP.
Anyway, just some suggestions
Chock