Yeah the 23 F2 isn't what I would call pocketable, maybe if you have a very big coat
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
The 27mm is your best option for that, followed by the 18 F2 - but that one gets bad to so-so reviews at best.
Could you do a direct comparison of between the 27m and 18-55 [at 27mm-ish] and same aperture [whatever the widest you can get on the 18-55, even F4] maybe? I would be real interested in that. Just a random scene, garden or whatever. I 'like' the 27, but keep feeling I'd like something a little more flexible too. I have the 55-200 and the OIS on that is insanely good.