Hi,
Personally, I'd go for the Honda - mainly because it *is* a Honda.
Having said that, I've yet to see the new X-Trail, but if it's as relatively flimsy as the previous model I'd still get the Honda.
I recently had a pre-purchase look at the old X-Trail and CRV and decided that, while neither seemed particularly substantial, the Nissan was even less substantial than the Honda - the doors seemed thin enough to dent by just coughing on them,
However, before buying the Honda I had a look at the Sportage. To be honest, the KIA's looks didn't impress me much - but when I took it for a test drive I was hooked. It was quiet, very smooth (for the type of vehicle) had bags of torque and (I like this bit) the doors felt very heavy and closed with a 'thunk' that I haven't experienced since my last Volvo estate.
OK, it's steer cred is low (no, strike that, it's Zero 😉 but the build quality is good, the kerbweight was the heaviest of the three, it's very comfortable to drive, and gives nearly 40mpg solo.
*Most* importantly, the dealer put it on the road (brand new XE 2.0 Crdi 138 bhp) for 14K - so I just couldn't justify to the extra