Hi, I was worried that you wouldn't take my comments well!!!
The Ospreys from the early 90s are actually quite good sources on the ECW. The Brassey's book is good but potentially expensive. The Phillip Haythornthwait book is full of really nice plates, but probably over half of them have quite serious errors (according to modern research anyway - things moved on very quickly just after that book was published), but the text is generally sound.
Of course it is totally up to the individual what they want to do/paint.