I use full foot fins as often as the open heel type. Tests done by a University researcher , Jim Grier show that full foot fins are always a bit faster than their strap siblings. I like the Oceanic Caribe and Plana Avanti Tre for freediving. Prefer the Apollo Biofin open heel for tankin'.
http://www.ndsu.edu/instruct/grier/fins.html
Mask wise, my vintage face plate is a "Seamate", an older, classic style made in Japan. When travelling, I noticed that one could still buy the Champion mask in the Bahamas and elsewhere. I had used those in the 50's but went over to the Dacor faceplate which had a slanted lens. The top of the skirt is molded such that the glass is closer to the eyes. The Dacor gave up the ghost. At some point I woke up to the fact that one could no longer purchase the simple, oval mask in the US, unless found in vintage condition at a flea sale like EBay. That's where it stands, but the Seamate is not ideal; the rubber is kind of funny, it lasts forever but likes to take a set leaving various wrinkles and distortions in the feathered edge. So, I said, "no problem, if faceplates are sold overseas, I'll just order one from those guys. Heh.
I would really like to order online but there are some obstacles. Most of the French shops seem to want the customer to Email or phone them. I have fired off some mail and will phone if necessary. I would like to do this the simple way, over the net with a credit card. However, there have been some communication glitches so I don't take anything for granted at this point. The French language is a minor problem, after all French is like English with an accent or the reverse, not quite sure. I've been able to figure out how to Email them and understand some of the other web directions by clicking and seeing the result. However, the problem with Vieux Plongeur is intractable. Neither of my browsers, Explorer 6 or Netscape 7.2, will function on the site. I get error messages and fragmented images. Even the Email won't work for me. I'm wondering if I need a plug in or something. The other French sites come up readily and navigate OK but don't seem to offer on-line sales, weird. However, they are very well populated with Email, addresses, telephone numbers, locations, etc so I'm not dead in the water, still treading though.
If these guys respond in French I may be contacting you over PM.
Pesky