Ah. I didn't see the fusion Airs. Well for me its always been easier to stay warm than cool. With the right socks and or electrics you can be comfortable in cooler temps. But when its hot it's harder to stay cool even at speed. IMO at least.
You'll still be happy with them Max. I have somewhere between 4-5K on my Road2s and my eye sees no wear at all. Some Z guys on riderforums are getting 10K outta them.
I have a pretty wide foot and vie had great fit with Sidis. I also keep going back to the Thor 50/50 boots Flying Brick is referencing. Really has heavy duty ankle protection. One of the sturdiest boots I've considered. http://www.kneedraggers.com/product/610749/Thor-50/50-Boots
Yeah you prolly should. Buying used isn't a bad way to go either. If you think about it they have been worn but aren't worn out. Mostly they're up on some pegs most of the time and walked in very little. Snag a deal when you can.
I'll be honest I have a pair of tourmasters that are uber comfy and waterproof. I have an older model but this is close. http://www.tourmaster.com/xcart/home.php?cat=7