<p>Can't see the face on the 310xt being any worse than the 305. My ex did break the faceplate of her 305, but it happened she hit a bump on the bike and it popped out of the quick mount. I looked at Amazon and the complaints are all by people who have dropped their 310xt's on hard surfaces and then are pissed because Garmin won't cover it under the warranty. Gee really?! You dropped your expensive electronic device with a glass faceplate and it cracked and you're pissed the company wants you to replace it? Really, they are relatively rugged devices but you need to take care of them. And when my ex broke the 305 faceplate, Garmin gave her a new unit for $99 (about 1/3 of the price that they were selling for at the time).</p>
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<p>You may also want to consider the 305. IMHO, the 310xt has two primary advantages. First, it reads ANT power. So if you have a PM and don't have a computer that reads power data, this may be useful to you. Second, it works in the water. So if you can now get GPS data for open water swims. But I still can't figure out how you use the 310xt during an IM race and don't get it ripped off by the wetsuit strippers. Plus the 310xt is twice the price of the 305. That may be worth it to you, it hasn't been to me yet.</p>
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<p>I would never consider the 405 given the small display size and the crappy bezel interface that I just sucks during Chicago winters. Give me buttons every day of the week and twice on Sunday long runs.</p>
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<p>Mike</p>