My Merkur Futur is my favorite razor. I may try others, but I always come back to it. For me, it has the best combination of comfort and efficiency. The heft is helpful in avoiding too much pressure, and I can make fewer passes on my neck to get a great shave there.
Safety razor is hands down the Supply SE. Nothing else even comes close for me. Straights, I haven't decided yet.
No question or doubt....... For me it's my Rx. I have a couple others that shave just as good, if not better than the Rx, but those are straights. Unfortunately, I can't give myself a 10 minute shave with a straight. But the Rx can, and does it straight like........ Nice.
Favorite SE is Gem Jr. Lather Catcher. Favorite straight is H. Boker 5/8. Favorite DE is birth era Gillette Aristocrat (46-47). Favorite OC is Gillette Sheraton.