Can anyone suggest a great Yoga DVD?

Hi all - I've done JM 30DS, RI30, and am finished up my last few weeks of Insanity. I was thinking about starting up some Yoga - though I have never offiically done or tried anything Yoga specific - only moves that were whatever was incorporated into those DVD's I already mentioned. Can anyone suggest any DVD's that you consider favorites or must-haves? I have a friend that suggested P90X Yoga, but I can't find it in single DVD w/out the program. I've researched amazon.com but there are soooooo many to choose from I don't know where to start, if I should stick solely to beginners DVD's or what. . .I honestly don't have a clue how difficult Yoga is or isn't so any help is appreciated. Also, I don't know if this matters, but I just reached my goal weight and not looking to LOSE but want to maintain muscle tone, increase flexibility, etc. . . maybe learn to RELAX a bit! LOL Thanks in advance for your suggestions!