Ya'know, on one level there are some significant differences in equipment and how they may perform relative to other equipment, under specific conditions. On the other hand, in a general sense the vast majority of average-level stuff works well enough for most people. So, I believe you need to first consider what types of diving you may be doing, under what conditions, how much you are willing to spend, what features you want/need, and then use that to start narrowing your list of available choices for further research or testing. There is myriad of stuff out there. My suggestion is to take your time in making your selections, and then search for the right dealer/price to make your purchases. This process alone is inherent with learning opportunities and can only serve to enrich your love of the dive life.
However, I think people sometimes lose sight of the fact that a lot of what scuba equipment is all about is life support. That doesnt necessarily mean that cheap equipment wont keep you alive. All Im saying is sometimes you get what you pay for, and for my money I want the best life support equipment that Im able to obtain.
As far specific suggestions are concerned, thats not always an easy one. Like a lot of things, some of this is going to be subjective. I could recommend all sorts of stuff, but that doesnt mean that it will work for you. You may not like, or even need, a specific feature, while I may see the same thing as very beneficial. Heres a list of some of the stuff Ive acquired. Like I said, none of this may be for you, but at least it may be a place to start. Go checkm out:
BCD = TUSA Imprex Pro 3D Cubic BCJ5900
Fins = TUSA X-pert Zoom (stiffer blacks)
Reg = Atomic Aquatics B2 w/ M1 exhaust-T
Octo = Atomic Aquatics SS1
Mask = Mares X-Vision (black skirt)
Exposure = Scuba Pro Everflex Steamer 3mm, and a Pacific Steamer Dive Skin 0.5mm for the Tropics
Knife = ScubaMax Ti (blunt end)
Computer = Suunto D9 w/ hoseless AI transmitter
Snorkle = AquaLung Impulse Dry Flex
Gloves = Henderson HyperStretch
Hoods = Henderson HyperStretch Full & Tilos 1mm Beanie
Weights = Soft
Booties = Warmers Delta II Boots, Henderson HyperStretch Boots, and TUSA Low-Tops
(Plus other various other bits and pieces)
This all works great for me, and like a lot of people its an evolving list. Im always on the hunt for new stuff. Its part of the fun of Scuba for me. I hope this helps at least a little bit in getting you started.
Best of luck to you!