Khao,

Good to hear and share stuff with you.
I've settled down with Line 6 toneport UX2, cheap and affordable, USB interface. You NOT only can used it as an audio interface for microphone (2 of them with phantom power) but you can also plug in your guitar(2 of them). The best thing is the GearBox software, which comes with it. With the same volume level I tested all those above softwares through toneport, the gearbox (which looks ugly by the way) sounds way better than guitar rig,amplitude or the Wave, since the interface is exactly designed for it. You can buy expansion packs from line 6 website which has more amps and some of the metal distortion sounds way better, but you pay. You don't have to open the gearbox software as a VST in your DAW;just playing along as a standalone will record the sound, so it is way smoother,won't crash your Nuendo.
Less hasssle, no stress on your CPU and can get descent quality sound. Here are some video on youtube.

Acoustic

Electric

Bass

Vocal