I dont have any experience with the TXL or F. However I picked up a 2wt Dart about a month ago. Fished it the first time this past weekend. I tried it with both the Orvis Superfine 2wt line and the Nock-off cheap eBay 2wt creek line. From my limited experience the Dart easily manages 2 size 18 heavy tungsten bead head flies, ( I was using a Caddis larva and Rainbow warrior in conjunction with the smallest Oreos strike indicator, I think is 5/8”. For short 10-15’ casts the creek line worked well and I could reach out to 30 or 40 feet with no problem. With the Orvis Superfine, I could do the same, the only difference was that the creek line loaded the rod with less line out. I want to try it out with a 3wt Superfine line. Fish ranged from 8”-14 or 15” trout, and a few smaller creek chubs. I would say the Dart is a medium fast action and has officially replaced my TFO Finesse 1 and 2wts, and my Orvis Superfine in 1 and 2wts UL rods. I still have a Orvis Recon 3wt, but a couple more trips with the Dart are in order to decide if it will be replaced or not. I recently contacted Orvis and acquired a 10’ 2wt Recon Blank and components for a Project Healing Waters Rod building class that I will be teaching. If I can figure out the picture thing again, I’ll post some pictures of my set up and trip.