I have never, and will never recommend buying gear without trying it on... There is SO much personal preference involved here. Only you know what will work for you, but maybe I can help steer you in the right direction...
Is this your first foray into tactical gear?
If so,
How do you generally play? What guns do you carry with you? How many mags? How do you carry water? What other gear do you carry?
These are the kind of questions I would want answers to before I even tried to give you a recommendation...
I went through 3 or 4 vests until I settled on my current rig... and god knows how many times I reconfigured each rig.
For that reason, I do suggest you look at some of the modular gear. I understand you are on a budget, but you should be able to build a nice vest for not too much money...
Im the Squad Leader/ Rifleman
And by on a budget, I mean I have $60, im only 13, so...