With REI customer-satisfaction guarantee (you don't have to claim a fabrication defect, just it's not working for ya), I went for the SP 2.0. Wow. Extremely versatile, 12F-54F range so far, dry calm, dry windy, rainy, sleety, snowy.

eVent is NOT totally breathable. It cannot compete with woven fabrics in this regard. What makes the 2.0 work is unsurpassed undershell-airflow versatility: bottom-up unzipping (plus conventional top-down unzipping), pitzips and widely openable velcro cuffs. Plus a backvent. It's an amazing piece of kit if you want one jacket that does a nice job for a wide range of conditions. Caveat: you have to learn how to adjust it. If you just do top-down front unzipping like most jackets offer, you won't "get it" as to why it is so good.

For defined specific conditions, there are lot of good and great jacks. The 2.0 is one of the best all-around jackets for whatever nature may throw your way. Let's say you wanted to do the Triple Bypass, starting at 35-40 F. Dry but chilly. It's good for that. You ride, you get warm, maybe too warm, unzip it maximally. Get some cool refreshing underflow air. Then as the sun gets high, it gets even too warm for this, so you roll it and stuff it in your jersey pocket. Your doing great. Then you get an afternoon thunderstorm. Put it back on, avoid rainchill. Storm over, take it off and stuff it again.