Good choices, (got both of those myself too) but as with everything, the more sources you sample, the better your understanding ends up being. New information is always coming to light even this far beyond the original events.
If you can find it, you might want to check out this series too, which is inexpensive but uses lots of great original footage. I was fortunate enough to be able to pick up several from that series very cheap from a local store (notably the one linked to, and another DVD in the same series on the Eastern Front battles):
http://www.boulevard-entertainment.c...roduct_id=5521
When it comes to WW1 and WW2, a good example of the value of studying things from several sources would be the Berlin Wall coming down and more open information being available in the West on Russian actions in WW2. The World at War TV series was made well before this happened and it suffers in some places because of this and the prevailing Cold War sensibilities of the time. So I'd grab a few books on the subjects too if I were you, including some written at the time - they too will suffer in that they will be tainted by nationalistic views and a limited perspective (and possibly the none-too-delicate-hand of the censor) - nevertheless, the language and ethics expressed in books that are contemporary with the period you study offer quite a lot of insight into the mindset of people at the time, even if some of the facts might be not exactly spot on. WW1 biographies are almost always a fascinating read for this kind of thing, and there is a great diversity of them too. Check out French WW1 pilot Charles Nungesser's opinion of Mata Hari for a good example of myth-busting, for example.
With regard to more modern takes on things, The Battle of Britain is a good example of this. The BoB is one of my favourite subjects and one which I've done a lot of research into, which is why I bought a video a few years ago titled 'The Battle of Britain - The Truth', the video case for which is showered with official RAF logos and museum approvals, yet it still trots out incorrect cliches and half-truths as well as 'information' that is just plain wrong, much of which has prevailed since the conflict was first documented. So even 'official' sources aren't always to be believed. Oddly enough, I just picked up a book the other day on that very subject (The Most Dangerous Enemy - A History of the Battle of Britain, by Stephen Bungay - ISBN 1-85410-801-8) which dispells a lot of this and is well recommended if anyone is interested in a thoroughly well researched and very balanced look at this battle. Especially since the decision to fight the BoB rather than sue for peace (as Hitler and many UK politicians wanted) was one of the pivotal moments leading to the defeat of Nazi Germany.
But bear this in mind too: A good friend of mine (now sadly deceased) who was an RAF Spitfire pilot in WW2 once lent me a few books on the subject, one of which was Len Deighton's book 'Fighter' (which many regard as a decent book on the subject), but my friend commented that it was worth a read as a general overview of the battle, but lots of it was 'complete and utter rubbish' and not anywhere even remotely near the truth. And that was straight from the horse's mouth!
Anyway, happy viewing of your DVDs, they'll certainly keep you occupied for some time!
Chock