Matt Smith will regenerate in the upcoming Christmas Special in December.
Start from 9! They have all of the 9th and 10th Doctors on Netflix and most of the 11th!
I have to agree with you on Eccleston being my favourite and first Doctor and how I feel about Classic Who. I really enjoyed The Three Doctors special with 1, 2, and 3 and also a ton of the 4th Doctor's episodes and a few of the 7th's. Matt Smith is really.. hit and miss for me. Some of this episodes
I thought were absolutely fantastic. Others? Not so much. Smith's first two seasons were kind of shaky at best in my opinion, and he didn't have the best writing (insert humongous bias against Moffat here) but I thought he tackled the humongous role fairly well. As far as Capaldi already being in the show, might I remind you that the actor who played the 6th Doctor arrested the 5th Doctor in an episode, the actress who played Martha in the new series was in the series finale of the series before her own, and the actress who played Amy was in the same episode as Capaldi (albeit not as major of a role). I don't know, just give the new guy a chance.
As far as 12 being a woman goes, I'll just say I see the Doctor as more of a paternal figure so I'm not so much for him regenerating into a woman haha. I mean, what if Susan catches up with him? ".. Grand.. mother..?"