Just for the sake of adding my 2c, I'd reinforce what's already been said about the importance of teaming a rainjacket WITH A WICKING BASELAYER. Living in Melbourne, I use my Sugoi rain jacket very frequently and have found that it doesn't work at well where it directly contacts my skin -i.e. my arms if I'm not wearing warmers. This could be because it wets out easily and I haven't bothered to wash it for a while though.
The other point worth repeating is that venting is more important than breathing. All the Goretex or eVent in the world isn't going to be of much use at all once things warm up if you don't have decent venting. For an example of how NOT to make a rain jacket, witness the Macpac Tempo eVent Jacket:
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No pit zips, no adjustable cuffs, no escape. If the temperature is above ten degrees or you are sweating much at all, this would be like wearing Glad Wrap. No airflow.
The reason that the Showers Pass design so good is the cut. It has big huge pit zips and a big vent along the back. Even if - like me - you have issues with the cut and the cost of the jacket, it stands a benchmark of clever design to measure other rainjackets against. The Sugoi is pretty good but lacks a nice rear vent.
My experience - and that of my Showers-Pass-clad partner- is that a rain jacket will keep you warm, but it certainly won't keep you dry if you're cycling hard in a downpour. All the marketing in the world isn't going to change that.
Also, regarding keeping my head dry, I've found that using a windbreaking ear-warmer or skullcap works great, even when it's really cold. Your head is gonna get wet either from sweat or rain anyway - I'd rather it was rain - but this keeps you warm, stops the wind chill and prevents water from flowing over your face or into your eyes. I tried using a shower cap and it wasn't bad, but I found I was less comfortable and equally wet under the unbreathable plastic.
As for warm feet, I found that Neoprene overshoes work great provided that they're fitted properly and you are wearing leg-warmers. Otherwise water will simply run down your legs into your shoes. I'm sure you can buy Goretex or eVent shoe covers but I'm confident that would be fairly pointless.
Finally, I highly recommend Rainlegs. Although all the straps and rubbery plastic make you look like you've escaped from somebody's gimp dungeon, they do a remarkably good job of keeping you dry and comfortable, especially in a total downpour. They are also very lightweight, take up almost no pack space and are easy to take on and off, unlike normal rain pants.
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