This subject is impossible for anyone other than yourself to answer completely. It is highly dependant on your intended diving profiles and your needs.
As for brands many of the well known brands have models that would fit your needs. May I suggest that you vote for a free market with your purchase.
Please avoid the manufacturers that require their dealers to sell for Manufacturers Authorized Retail Price (MARP) This is nothing less than legal price fixing that artificially maintains the high price of gear.
Instead seek out Brands that use MAP pricing Minimum Advertized Price. This allows the dealer to set the price they wish to sell for. It only requires them not to advertize a lower price. This allows you to stop in or call and negotiate the best deal you can. I can save you some serious coin when shopping for scuba gear. Don’t let anyone convince you the best brands don’t negotiate it’s just not true the top MAP brands offer models just as good as the MARP brands and in many case superior models are available at discount from authorized dealers.
Case in point Oceanic EOS and Sherwood SR-1 are 2 of the top rated environmentally sealed regulators available (So good that in blind test divers are high unlikely to be able to tell one from another or from regs costing twice the price)