Road helmet required but which one?

Looking at the giro monza or giro Atmos. any suggestions on these 2 or is there any other good range models to look at. Dont like specialized as are too big/high. thanks in advance of any replies
My bikes
2018 Trek Emonda SL6 Pro
2018 Trek Emonda SL6 Pro
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I found the Ionos very comfy (and like you more so than the Atmos) - but ridiculously heavy for the price. It weighs a fair bit more than my Giro Havoc that was about a third of the price of a Ionos. I recently bought a Kask Mojito which is very light and very comfy and cheap compared to the alternatives. I think the Mojito is clearly the best buy in the Kask range but nobody seems to have a word to say against their Kask whatever model they have.
2018 Trek Emonda SL6 Pro
ABCC Cycling Coach
The Bell Alchera is decent with lots of vents - and seems discounted everywhere at the mo. If you're feeling more flush, check out the Sweep and Volt.
I took the plung and got a K10 from CRC. Double what I've ever paid for a helmet before but won't ever go back now. It's like I haven't got a helmet on
http://www.pinkbike.com/photo/2236156/
http://www.pinkbike.com/photo/2236165/
Rough prices, rough weights- hopefully all close enough though.
Giro Ionos - 310g, £160
Giro Atmos - 270g, £116
Giro Havoc - 289g, ~£50 (nla)
Kask Mojito - 220g, £100
Giro Aeon - 220g, £180
It's a bit like spending £3k on a bike frame that is no lighter than a £500 Ribble frame. What is it you are actually paying £160 for when you buy an Ionos? I'm not saying it isn't good, and it was very comfy for me, and they look quite nice but for a top end lid it is a heavy old thing. Giro just don't seem to offer anything approaching good value for money unless you can get a hefty discount.
2018 Trek Emonda SL6 Pro
Giro Savant - 238g - £53.99 on wiggle (as low as £37 elsewhere)
Seems like good value to me!
Edit: Just seen I'm beaten to the same point!
I got the 59-63 cm version for £40, weighs 220 grams dead. Fits my round head, if you had a Bell Alchera and it fit, or you have a round head it will fit
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