@MasterMindDiver
before my recommendation. I currently own the following
Dive Rite XT
Scubapro Jet Fins
Mares Avanti Quattros
Deep Six Eddy
Hog Tech 2-Same as Apeks RK3, Poseidon, etc all same manufacturer
I owned OMS Slipstreams for quite a while and have a lot of dive time on Hollis F1's.
Your decision is unfortunately going to be based on two factors. First and most important is your foot size. I am very limited in fin selection because of how wide my feet are, so few fins fit my feet, especially in a drysuit. Second and also very critical is whether you go sidemount or doubles. You can use either fins with singles, but is quite important for doubles/sidemount.
If you choose sidemount, then I would go with Deep Six Eddy or Dive Rite XT. Can go either way based on personal preference. Either of the fins will require significant leg strength to move quickly, but anything that requires less effort, will require more kicking to get somewhere.
If you go doubles, which you will if you go with GUE training, then Hollis F1's are probably where I would go at least until Deep Six comes out with a negatively buoyant fin, if they do. I think the F1's are better than the Jet Fins, but I can't justify the cost to switch. If I were buying new, it would be the F1's