Between the Montane Minimus Smock (5oz), Westcomb Focus LT (7oz) and Haglofs Gram Comp Pull (7oz), there's going to be some really nice rain jackets for this fall (Focus) and next summer. All of these use better membranes that the PU ones found on most UL rainwear.
Montane Minimus Smock (5oz/143g) = Pertex Shield+
Westcomb Focus LT (7oz, 195g) = eVent DVL
Haglofs Gram Comp Pull (7oz, 200g) = Goretex Active Shell.
The Focus LT looks the most promising to me. It supposedly offers a nice long 'full cut' instead of the 'abbreviated' fit of most UL jackets. It's the only one of these three with a full zip, eVent and velcro wrists.
The Haglofs Gram Comp Pull looks like have really nice fabric and hopefully has the great cut of the Ozo it replaces, but it looks like the [highly desired by me] thumb loops are gone. Great jacket, but unless the fit is amazing there's not many reasons to buy it over the likely cheaper Focus LT.
The Minimus Smock is the true lightweight champ and it does have that huge belly pocket for your maps. My wife has the regular womens Minimus Jacket and I have the Minimus rain pants. We've both been quite happy with them so far (quite limited use). The face fabrics are nice, but the actual membrane on the inside looks quite thin. Hard to say how long it will hold under pack straps etc. Appears to have non-adjustable hood, unlike the other two jackets. Likely the best choice for a rarely used jacket, but for 2oz more you can get a lot with one of the other coats.
Haglofs Gram Comp Pull: http://3.bp.blogspot.com/-WKDODxDq-a0/T_YEamiOqYI/AAAAAAAAAeA/Kk-FhprOotY/s1600/Gram_Comp_Pull_Firefly.jpg
Westcomb Focus LT: http://2.bp.blogspot.com/-aesXbnAhR6c/T-0BSaEmgsI/AAAAAAAAG18/by5_FdjLoFM/s1600/Westcomb-FOCUS.jpg