I agree with some of the other members that a fancy-pants camera isn't everything. It's just a tool, as stated earlier. However, if I were you, that wouldn't stop me from buying a nice camera. I love cameras btw.
Best one under $5,000? Easy question. RED Scarlet!!! ...don't know if was mentioned previously or not. I was too lazy to read them all...
Why Scarlet? Well, the primary reason is image quality. It's $3,000, so it's not nearly has expensive as the HVX or EX1 (other popular choices). However, it has better resolution than Sony's premiere camera of its CineAlta series, the Sony F35, which goes for $250,000. Hmmm, that's a hard choice: $250,000 or $3,000. I'm not saying that the Scarlet is better than the F35 in every way, but it sure is a good camera. I shoots in RAW 3K footage. That's what we call, "Ultra High Definition". The Scarlet is THE best camera under $17,499. I would say a lot higher, but the RED One is $17,500... The Scarlet also incorporates a 2/3" Mysterium X sensor, which is supposed to give it a similar depth of field as 2/3" ENG cameras.
The Scarlet is a, "Pocket professional camera". Not Consumer. Not even prosumer...professional.
---but it's not available yet