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