Purge masks have their place, but sometimes new divers assume they are easier to clear before they have learned and practiced. I can understand why someone would think that, but they really aren't. And the purges can leak or make it hard to pinch your nose, and some of hthese masks are higher volume, so those are things to consider. Fit is the most important thing in a mask, not brand.
Valves and splash guards and other stuff can be nice for snorkeling, but not as good for diving - because if the snorkel is too bulky it's a nuisance to wear on your mask and difficult to put in your pocket if/when you decide not to wear it on your mask anymore. I like a roll up snorkel for diving and a semi-dry snorkel for snorkeling. There are some semi-dry snorkels, roll up or flexible, with purge valve and simple splash guards that are a decent compromise if you want the features.
Split fins vs paddles is something you can read about the pros and cons all day, then decide which opinions might actually apply to you. But mostly you have to try them and form your own opinion.