Unless you've been very unlucky and managed to get hold of a duff batch of fabric each time, the membranes shouldn't leak unless you puncture them, or the seams fail.
If you don't keep them clean*, and the outer DWR finish topped up, you can stop them breathing, and then you'll get wet, but it's your own sweat that's building up, unable to escape, and not water getting in from outside.
Event is more prone to this because of the way the membrane is constructed.
Paramo isn't technically waterproof, and it's possible to get wet if you apply to much pressure to the fabric (like kneeling in a puddle) also Paramo needs more looking after than Gore or Event, so if you've not looked after your membrane waterproofs to the point of apparent failure, I'd suggest not getting a paramo as it'll "fail" even quicker.
If you're wanting a membrane based jacket again, have a look at the Marmot jackets made with their "membrane strata" material, it's supposed to be as breathable as Event.
Edited to add:
* by clean I mean washed in pure soap or "Techwash" as detergent and fabric softeners will bugger up the DWR and breath-ability of the membrane until they are washed off.