I love my BP m4
[quote=slantface;2623567]M4 - black paint. I ended up buying one awhile back, and they are just so beautiful. It's become my main camera, even though I've got others to choose from including an MP and an M6, the MP being on your list of possibilities. With that being said, the M-A looks fantastic, and for a brand new fully mechanical M, it's really got a draw for me. Any which way you go, I'm sure you won't be disappointed, but you could probably get a BP M4 for around 3k or less, and use the remaining money from your 5k budget on film/lens/etc.
Another thing is you'll already know the camera well seeing as it's another M4, but not only will it be pretty, it'll be obvious which camera you have loaded with what, and which lens since you'll have a black and a chrome M4...
I really love the BP m4. I use it a lot and it is great. I have an m-a, which feels more solid, but the m4 is more fun!