I was in your shoes few months ago. Now I have all required equipment. My logic in buying stuff was the following (maybe this will be useful for you as well):
1) Wetsuit - I choose Seac Komodo 5 mm as this is a very nice looking wetsuit, made from Yamamoto material (reviews say that this suit is warmer than others). When choosing wetsuit, the most important thing is proper fit and comfort. from all wetsuits that I tried Seac fit me the best. My wife found that only Beauchat wetsuit fit her very well.
2) Regulators - I choose Scubapro MK25Evo / A700. These regulators can be used in cold water, are very good quality ( I read various reviews before buying it. Scubapro regulators usually are more expensive than their analogs from Apeks, Mares and etc. I choose Scubapro because I like this firm. Octopus - Scubapro R195: good octopus, mad by my favorite company. SPG - Scubapro.
3) Dive computer - Cressi Newton. When choosing dive computer I had to take into account that my wife is also diving and she did not want some fancy dive computer (e.g. Shearwater, Oceanic, etc.). I choose Cressi Newton as it is pretty simple , Air / Nitrox, watch size computer with user replaceable battery. Also, my wife liked Cressi design more than other computers
4) Fins - Scubapro Seawing Nova 2. I read many reviews about fins. Also, my instructor had the same fins and was very happy with them. From my diving experience I can also recommend these fins (they were very useful when I was diving in strong currents).
5) BCD - Scubapro Hydros Pro. Read various reviews, really liked technology, design. Me and my wife are very happy with our choice. The only drawback of this BCD that is more expensive that their analogs made by other firms.
6) Torch - Mares EOS RZ20 - Powerful torch (2300 lumens), rechargeable. I was looking for powerful torch which is rechargeable (I do not like to buy batteries and increase wastage). When I had night dives I had simple torch and could not see anything. That's why I decided to buy powerful torch and now I am more than happy. Night diving became a pleasure as you can clearly see everything.
7) Diving boots - Scubapro Delta. They just fit me well.
8) Diving knife - Scubapro mako Titanium. Nice knife but would recommend Eezyut Trilobite (ordered for my wife) as cutting tool is better at cutting and price is much lower).
9) Mask - Tusa HD. Good and nice mask but now I would buy low profile mask as it is more convenient.