Rubens I have read some mixed reviews about Claire. I think it may lack some pedalling features, although some demos sound good.
A couple of days ago, I bought Noire in their cyber sale, (50% off) and I am really liking it so far.
I am not a computer geek, but must have got lucky with my current setup.
Just a mid range Windows PC, and 1st gen Komplete Audio 6 interface.
i prefer to use standard midi connections rather than USB, and have no problem feeling connected, or with playabilty.
I am fairly sensitive to latency, but do not notice any difference when playing either VST or onboard sounds.