I mostly use a GB SCA, a Svante Djarv little Viking axe and a Stefan Ronnqvist axe. I agree with Simon that it's a personal preference and you get used to your axe. The most important thing is technique. The GB is the heaviest of my axes and the only one with an asymmetric grind. If you're planning on using it for truing the face of a log then it's probably your best bet, but again, with the right technique you can use a symmetrical bevel to do the same. The Svante Djarv is a great axe that is a bit lighter, but only by a couple of hundred grams (don't be fooled by the name, it's only little compared to his large viking axe, which is an absolute beast, ask Simon about it). The Ronnqvist axe is my preference for more detailed work like spoon carving and it's also very versatile. I also agree with Simon about Nic Westermann's axes. He has recently posted some examples on the edged tools forum. When funds permit I'd like to talk to him about making a small axe around the 400g weight.