I've read a lot of complaints abut the 5D Mark II's slow AF system, and read a lot of good things from that of the 7D. So the combination of each camera's strengths put into one package sounds like a good place for me to start.
I've been a fan of photography for some time now and want to take it up to execute my artistic and commercial aspirations. With that said, I'm solely interested in a FF camera. My photography will be a mix of street and studio with heavy emphasis on portraiture. I'd like to shoot at 50 and 85mm and feel that a cropped sensor would compromise the ideal perspective that I have in mind. A DSLR that can shoot video well is an interest of mine as well.
Here's where my inexperience comes into play and where I'm hoping you guys can help me: If I want to achieve the same perspective that i'd get on a FF camera shooting at 50/85mm, in theory, wouldn't I just increase the distance from my subject(s) on a cropped sensor? Or would compression/distortion be a consequence to an increase in distance from the subject?
If yes and no, then would it behoove me to go with something like a D7000 and buy some lenses that would be about the equivalent of the desired focal lengths I want to shoot at? I figure it's more than an efficient camera, and the money I'd be saving from not buying one of the more expensive FFs will allow me to invest in some nice glass.
Ultimately I'm willing to invest $2500, maybe $3000. Although I would just be starting, I'm going to go into this for the long hall. So, I'd like to invest my money into quality and capability rather than settle for something that seemed like a safe and practical buy for a beginner.
To use an analogy... I want to become a pianist and buy the best keyboard for $2,500. I could chose a 76 keys keyboard for $1300 or a full 88 key keyboard for $2300. Although 76 keys is sufficient for most pieces, there are certain songs I wont be able to play without the extra 12 keys. So, if I'm going to take it serious, shouldn't I invest my money in the 88 keys keyboard so that I have the option to play any song of my choosing without any limitations?
I've been a lurker on this site for a while and really value a lot of your guys input. So, what do you guys think I should do?