Ok, let's have a look at the Presonus options. All of them have direct monitoring but still there's some major differences to be aware of.
1. Presonus AudioBox iOne
Just 1 microphone input and one instrument (Hi-Z) input. No line input. No way to record the Kemper in stereo, no extra outputs to reamp.
Verdict: Waste of money
2. Presonus AudioBox USB 96
Just microphone/instrument inputs. No line inputs. No extra outputs to reamp
Verdict: Waste of money
3. Presonus AudioBox iTwo
2 mic/line/instrument inputs. Enables you to record the kemper in stereo but still no way to record a DI track or anything else at the same time. No extra outputs to reamp.
Verdict: The most basic version that works but still very limited and a little outdated. Not recommended
4. Presonus Studio 26c
2 mic/line/instrument inputs. Enables you to record the kemper in stereo but still no way to record a DI track or anything else at the same time. 2 extra outputs, so you could reamp if you had enough inputs to actually redord a DI track.
Verdict: Things are getting better but still not recommended
5. Presonus Studio 68c
Finally things are getting good. A total of 4 mic/line inputs, 2 of them can also be used for instruments (Hi-Z). On top of that you get S/PDIF input and output. Great. And you get 2 extra line outputs.
Verdict: This is the first audio interface in the Presonus line I would recommend. It has enough input and output options to even record the Kemper in stereo, plus DI track, plus a microphone ... for example.
Two downsides:
- It has only a direct monitoring switch (MON), that mixes computer playback and input signals at a fixed 50:50 ratio. It doesn't come with a software controlled DSP mixer to create custom monitor/cue mixes.
- It isn't USB bus-powered, so you need to use the power supply (which is normal for interfaces with this feature set or bigger).
On the positive side:
- The input / output channel count leaves you enough room to do things you might not yet think about. So I'm sure it will serve you much longer than the entry level interfaces.
- It features Loopback functionality. While you might not yet know why this can be a great thing to have ... it IS great to have, if you're using a Windows PC.