for the OP: few suggestions for when you get your HX Effects:
Take a bit of time to read the documents & watch a few YouTube videos about it - the more you learn about the interface, the less frustrated you will be trying to dive in. (If you spent enough time with the HX Stomp previously, you are already familiar with the Helix basics). You can adjust everything from the pedal itself, I like using the HXedit program from a PC, particularly when making set lists (usually set up a template & then make 1 preset per song).
A must-do after verifying it works: factory reset & update to the latest firmware (3.15 as of date of this post), make a backup of your settings, will need a printer USB 2.0 cable. Depending on how out of date firmware is when you get it, there are some very meaningful additions in the latest - new effects, bug fixes, etc. Bunch of recent YouTube videos that walk through the new effects in each recent firmware version.
I own some Strymon & Eventide pedals as well, no experience w/Fractal, I know it is a heated "religious" debate between Helix family and others. I have had two of them on different boards for almost 3 years- love them for their jack-of-all-trades ability and the programmable text LED strips, the combination of 4CM, onboard loop & MIDI capability make it very useful, especially in that price range. There is a ground loop possibility if you are using it to switch channels/reverb via 1/4 jacks on your amp - depending on the amp; specific limitation of the HX Effects that doesn't exist on full Helix floor- design limitation of jamming features into the same jacks.
I'm owned multi-FX units all the way back to ART SGX2000 in mid-90s, the one universal truth I learned regardless of the device: build your own presets from scratch for the best results, the factory presets will take a bunch of tweaking to get "right" for your rig, might have things buried in the settings you didn't want or fully understand.
The L6 tech staff are very active on their own forum & The Gear Page and do pretty regular firmware updates. Here's the latest release notes - the latest reverbs have got a lot of praise, particularly considering reverb was a major weak spot in early firmware:
https://line6.com/support/page/kb/effects-controllers/helix/helix-315-release-notes-r992/
Look forward to hearing your impressions!