I've had some experience with both the Roland SPD-SX and the SPD-30, so I can share a bit about how they might suit your needs. Both are excellent for practice and live performance, but they cater to slightly different requirements.
The SPD-SX is often preferred by musicians who need a sampling pad. It allows you to load your own sounds and samples, which is fantastic if you're looking for a lot of customization in your performance. It's quite intuitive when it comes to importing and triggering sounds, and the sensitivity is top-notch, making it feel almost like playing an acoustic drum in terms of response. It also integrates smoothly with most DAWs, so if you're looking to record or manipulate sounds digitally, it's a solid choice.
On the other hand, the SPD-30, or Octapad, is more about built-in sounds and rhythmic possibilities. It doesn't have the sampling capabilities of the SPD-SX, but it comes pre-loaded with a vast array of high-quality sounds and kits, which can be a huge time-saver if you're looking to get started right out of the box without much tweaking. It's also quite durable, making it a reliable choice for live setups where you need an all-in-one solution.
As for integration, both pads connect well with electronic setups, and you can use MIDI to link them to other gear or your DAW. Just ensure you have the right cables and interfaces for your setup.
For sound quality, make sure you have a good amplifier or PA system if you're playing live. At home, good headphones or studio monitors will help you get the best out of your practice sessions. In terms of settings, play around with the EQ and effects to tailor the sound to your preference and the acoustics of the performance space.
Have you decided on what kind of sounds or features you're most interested in? Sometimes narrowing down what you really need out of a drum pad helps make the decision easier.