I've used a variety of all the above. I now have a pair of Avanti Quattro ABS having given in to the sheer expense of them. I had a pair of SCUBAPRO Razors before that (don't buy these, they snapped at the flex point after less than 20 dives). the Avantis are wonderul, they are flexible enough that they flute and power you through the water with little exertion required. i have muscular legs and so I thought that they would be too soft, but I was pleasantly surprised. I don't advocate splits simply because they allow you only one or two fin kick variations and don't allow you the power if needed to tow. if you are into videography or photography, defo give them a miss, they don't offer enough stability. Hope this helps.