For SDS1000X HD both the external HW and licenses are needed. [...]
Well, the internal AWG is nice if you want to save bench space, but if I didn't own an SDG2k already, and given the choice between the internal AWG and an SDG1032 (which has two channels and 5Mhz more range), for some €50 more, I don't think the offer could convince me. The value proposition is a bit weak.
Siglent promises us interaction between the SDG and SDS, which I'm expecting will be just somewhat less comfortable than using the internal AWG.
The SPL2016 admittedly is a lot nicer, but it's not like the SLA1016 is bad.
Let us not confuse fact that SDS1000xHD is amazing scope for the price and good fit for you with stating there is no difference between the 1000/2000..
SDS2000xHD has additional:
- BW up to 500MHz.
- 2x2GS 4x1GS ADC converters
- many more decodes/triggers
- MSO is built in and fully integrated into triggering (including mixed digital/analog)triggers. SLA1016 has very nice sampling rate, but there are some limitations by it being external sampling hardware. Performa01 made very good (amazing work, in fact) review of 800xHD in which he, among many other things, addresses working with SLA1016 and details about it. I highly suggest reading it.
- additional acquisitions modes.
Those are just of top of my head. There is more but those are obvious. 2000xHD is definitely class up.
If none of that is important to you , then SDS1000xHD is great choice and SDS2000xHD in not needed for you....
If you only need subset of features of SDS2000xHD that is covered in SDS1000xHD, there is no need to pay more for stuff you won't use..
That is good logic, and reason why Siglent decided to make 800xHD,1000xHD and 3000xHD...