In reply to JayPee630:
> Have seen the Arcteryx SL Hybrid online which looks good,
I googled that - it appears to be a standard goretex hardshell, not a softshell at all. Anyway I was just going to suggest a lot of the softshells people are suggesting ARE membrane fabrics, Powershield is, Windstopper (the Norrona one Daniel suggested) is etc. That might not make them bad softshells by any means - but if you know you want a non-membrane one its something to be aware of.
I think in dry, cold weather stretch woven softshells (like the Rab and Montane you mention) can be great. I had a Marmot one for years and years that was my main ok weather ice climbing jacket for half a decade. No sweat, stretchy, super hard wearing. I now use a Haglöf one - Viper I think - which is also good and has done lots of service for at least five years. But I know they're not windproof in lousy conditions. For big mountain rock routes I still tend to take a pertex windproof because they're so light and are windproof. I use the stretch-woven softshell for general cool weather cragging, a summer jacket, and sometimes for 'sweaty' winter things like XC skiing or when I go to the little local icefalls and solo a bunch of the moderate and easy lines.
My mate has the RAB Exodus and it looks great and he seems to really like it. Seems to be a bit heavier (hence warmer?) than the Scimitar.