I got a Shimano Storm Jacket on sale ($50 at Nashbar) a couple of weeks ago and like it pretty well, although we haven't had any rain yet so my experience is limited. I just needed something a bit lighter than my Columbia Gore-Tex/Thinsulate parka. This review of the Shimano jacket covers most of my own impressions well enough, so I won't repeat the reviewer's points here. I'll just mention a few observations:

So far the Shimano jacket has been comfortable between the high 30s-60s. It's very wind resistant. A couple of rides I felt a bit overdressed wearing a cotton t-shirt and cotton long sleeve jersey under the jacket. A proper wicking underlayer might have felt more comfortable - I just ordered a fancypants Izumi base layer undershirt, so we'll see how that goes.

The elastic inner sleeve and Velcro strap outer sleeve seem very effective. (The reviewer describes it in more detail, with photos.) I was surprised to find my wrist feeling a bit damp after a ride. Never thought of myself as having sweaty wrists. Now I make sure the elastic is on top of my jersey sleeve.

The rear vent is good, but I'd like to have armpit vents as well. I'm tempted to have the jacket modified by adding some metal mesh grommets to the armpits. I wasn't soaked from sweating during a recent hour-long ride in 60-something degree weather, but felt just a bit clammy. Armpit vents would help.

The fit seems to match Shimano's guidelines. I'm 5'11" and 165 lbs with 42" chest, long torso and average arm length for my height. The large fits me well, and leaves room for a sweater without feeling bunched up or tight. It fits just a bit loosely under a single layer, or t-shirt and thin overshirt. I don't ride fast, don't wear tight fitting cyclist garb, and didn't need a tight fitting jacket to cut down on wind resistance. A more demanding rider might find the Shimano jacket too loose and bulky.

For commuting it offers adequate reflective touches in the piping, etc., but I may add some reflective tape across the back. I got the sky blue with hi-vis greenish/yellow forearm sleeves.

For Texas, it's just about perfect. With layers I expect it'll be comfortable down into the 20s (although our winter so far has been ridiculously mild - more like a very early spring). And it's been comfortable enough up to the 60s. But, again, no idea yet about rain resistance, so I'll defer to the reviewer in the linked article.