Genesis Datum owner opinions

I have a Croix de Fer and I do get some rub when climbing out of the saddle.

The rotors are as true as possible but it still happens, I'm reasonably heavy (85kg) so could be down to flex?

 II have a CdA and an Equilibrium, but was put off the Datum by the fact that it wasn't suitable for a rear rack or a beam, seems to be for day riders only. Also, it seemed very expensive. Discs are not a problem, as others have said.

I'm a pretty big lad and when I'm laying down the power I get a bit of brake rub on my fulcrum 7s. Imagine it's probably down to slightly flexy wheels - can hear a distinct 'ping' but that's about it. Wouldn't say it's a major problem or anything though, only happens when I'm really hammering it and anyay, it's nowhere near what I could manage on a rim brake  

really nice looking bikes the datums, nearly bought one myself.

I've ridden more than 20000km in Scottish weather (so sun, snow, rain, hail, hurricane, pestilence, midges - and that's just in one morning ride) over the last 2 years on disc-braked bikes - at no point has there been any brake rub...

However on swapping wheels (new wheels) there was a very slight rub due to the infinitesimal change in position of the disc with respect to the fork. Easily resolved by resetting the caliper on the mount and ~5000km later I've not had to revisit it.

Disc brakes are much less likely to rub under power as they are attached to the hub, also in a smaller distance from fixings. Never happened to me.
If they are hydraulic brakes the pads are slightly sucked back from the disc when the brakes are released.
I have changed to sintered pads, I find they are superior. Not noticed any increased disc wear. But like discs on vehicles, they do wear out at some point, service item

My commute bike has discs, it's the first bike that I have had with discs, and I cannot fault them in anyway, I have to say in wet weather they are excellent, I've never had a problem with them either sticking or rubbing