Well honestly I'm sick and tired of my deagles, they've served me well but I think its well-deserved rest has been delayed far too long. I'm not really planning on basing, I prefer pking but it would be nice to have a semi-balanced gun, just in-case I want to shift focuses.

Tons of people told me to get the AKM, Default Rifle, M4, and the Bushmaster ACR.
If you know any cheaper alternatives, as I'm only coming from deagles, please let me know.
If you think I should make the leap from an 11k gun to a gun that's 50k'ish, also let me know.

Finally, I just want to know what's the best option out of the four guns - AKM, Default Rifle, M4, and Bushmaster ACR - I've heard that they're all good (and I know that), but if you guys would have to choose between them, which would you spend your hard-earned cash on?

I'm new btw, having the deagles as my only bought gun currently.
Thanks.