@Nismo123, welcome to the StrongFirst forum.
IMHO, who you are matters a great deal to what sort of barbell you might wish to get. I spent 10 years or longer lifting on the cheap bars that many people say you should never buy, and they worked just fine for me. I got the right sized Allen wrench to tighten the ends, which were always coming loose, but I still have the bar that came with my first 300 lb. CAP starter barbell set, and it's still working just fine.
The people who make these things and label/name them know what they're talking about, e.g., the Rogue Ohio bar is a competition-legal bar in the IPF/USAPL, so there is very little flex or whip in it, which makes deadlifts harder. Many deadlift-specific bars, including some that have been approved by various powerlifting federations, are slightly narrower, have deep knurling, and bend - all three of those qualities can add pounds to a competition deadlift, and some of the smaller federations feel that any advantage they can give their lifters, so long as it's given equally to everyone, is fine - people like setting PR's, and if they can more easily PR at a competition, so much the better for attendance at PL meets and membership in PL federations, in their opinion. (Mine, too, truth be told.)
So, if you're new to lifting, I don't think I'd be spending big money on a bar or plates or clamps. After my first set, I bought the next bunch of stuff from craigslist and some of it was pretty beat up, but it all worked and I still like having the extra bars and plates around.
And if you compete, I would get something that's competition legal to train on, e.g., I still own an Okie DL bar, one of those slightly thinner, deeply knurled, and slightly flexy bars, because they use them at WNPF meets.
NB: I love deep knurling. Not everyone does.
Just my opinion, and your mileage may vary.
-S-