I have the xs version of the fabers. The LDS said to avoid the FX. The tank is the same but the valve is better. I wasn't buying from the LDS so I'm assuming he was passing on non $ based advice. Anyway I have 4 of them, 2 100's for me and 2 80's for my daughter. The 80s haven't seen water yet but I've dove the 100's a couple times. They are my.... 1 billionth tank since I started diving (not really) but they seem to work well for me. I've only dove aluminum during my classes and on vacation, had a bunch of 72's, 120's and LP 95s. The 72's were the best of that bunch, but I wanted a little extra 'breathing room' so I'm on the 100's now. They seem to be good for my weighting. The LP95's were absolute anchors even empty with no weight I was really negative. I'm on maybe 4 pounds, no wet suit, with the 100's. I could likely do 2, and might get away with 0. I run out of bottom time before I run out of air, but I'm finishing nitrox now and staying at rec depth so that may change. I can't imagine needing to strap 130s on for my diving.
Longevity wise, the paint will get scuffed up, nothing to worry about unless you strike steel. Galvanized is no different in that aspect. As long as you're not seeing the actual tank material, it's just a mark. If you see steel, clean it and touch it up. Use gray paint for the painted, some cold galv for the galvanized tanks. Easy peasy.
