Best to try some on. Everyone has different shaped heads so what's good for someone else might not suit you. Don't think you can go far wrong at that price point if you go for a good brand.
1998 Kona Cindercone in singlespeed commute spec
2013 Cannondale Caadx 1x10
2004 Giant TCR
I am very happy with my Kask k50 evo - light, easy to adjust and well ventilated without too much of the mushroom effect. There's are review here (but unlike the reviewer I didn't get a storage bag with mine): http://road.cc/content/review/25853-kask-k-50-helmet
Where is that for sale in the £50-80 range? I'd love to buy one but I've rarely seen them reduced at all, and even if they are it's by £5 or so max which puts still puts them at ~£95.
You have to try some out - what fits and looks good on one person, will hurt and look ridiculous on another. They all conform to the same safety standards in Europe (which is pretty low).
Posts
Can't remember top 3 choices though, worth a look
2013 Cannondale Caadx 1x10
2004 Giant TCR
http://www.chainreactioncycles.com/Mode ... elID=77084
Peter