Planet Eclipse 09 Overload Jersey
OK, I will be short. I have tried a number of chest protections before buying this one. And it is the best as far as the level of protection, ventilation/breathing and design.

Here is what I compare it with (high rating first)

1. Empire Grind SN Men's Chest Protector
2. BT Bulletproof Men's Chest Protector

The following vests (and not protective jerseys) are OK for kids or occasional users, but too heavy and sweaty for frequent use/high temps.
Redz Chest / Back Protector Chest Protector
NXE Chest Protector
GXG Paintball Front Back Chest Vest Protector

All in all your overall choice depends on your budget. For $20-30 you can only get a vest. Investing $20-30 more will give you a quality jersey protector.

My advise: check reviews at pbreview, pbnation or actionvillage. This should give you an idea what product is the best for you.