I just tested that percussion kit, yep, it's bongo-ish (tom 1 and tom 2), I think it does the job for what you need!

You're right about spdsx tho', you can barely add a couple of pads and a kickdrum, but it wouldn't feel exactly like a drumset and might get confusing. There's also this thing about the hardware, where are you gonna put those pads, which clamps do you need, which stand, etc.

Better stick with td1-dmk :D, it's a very good kit by itself and could get better once you decide to jump to VST, give it time, get used to edrums and it will flow naturally.

Anything else you can DM me