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I've wrecked 2 pairs of road racers due to toe overlap (and couldn't fit the rear on my Canyon with 25s), so decided to try some raceblade longs. They were a tiny bit more hassle to fit the clips - but should be a lot easier to remove compared to the zipties for raceblades. They feel so much more sturdy, and just generally better quality. Would recommend.
Also, if you have the road racer, you can use the front third of the rear guard to get full FD coverage, like this:
http://www.cyclechat.net/threads/raceblade-long-road-racer-franken-guards.120748/
P-clips, something like the PDW will defintely keep you dry providing you didn't max out the clearance with wider tyres.