Well ok... Helix Native vs. the "local contrarian" (aka me) then.
Personally, I wouldn't recommend it to anyone not using the hardware as well. Let alone when purchasing it at the full price.
Without any doubt, HXN has a lot on offer, but the same is true for Amplitube, especially the Max version, which even includes the full Tonex shebang.
Anyhow, the main reason why I wouldn't exactly recommend HXN is that the on-screen-editing experience isn't good IMO. Sliders are a bad choice, the scrollwheel sweet spot range to either trigger a parameter or the scroll bar is just not sweet (so you'll end up with lots of scrollwheel actions going wrong), general visibility is so-so-ish at best (distinguishing between active and non-active blocks can be really tough), amp models aren't looking different, so you need to look up what they are from the text label, you can always only see the parameters for one block at once (unlike, say, in S-Gear, which is exposing all relevant parameters of all blocks simultaneously), there's no keyboard support (so you can't, say, scroll through any lists with the arrow keys), so the entire editing experience is becoming a huge clickfest.
Many of these issues could be adressed, but apparently they never will be.
Don't get me wrong, if you can purchase HXN for the hardware owners discount (typically 99 bucks), that's an incredible lot of great sounding stuff you get for your money. But if I wasn't owning the hardware, I'd personally rather go for S-Gear (note: doesn't do metal, so that might be a showstopper) and use some external FX plugins for the ground not covered.