Power-wise, the DELL XPS you have is well above the minimum requirements. Good call going for the Quad Core-i7, you'll get several years of use with such a nice spec.
To be honest, I've never been a fan of ASIO, no matter what type of PC brand I used, as I've always encountered issues. That said, my issues were primarily based within my DAWs. I digress.
You should be just fine with your current setup. Just juggle the buffer for latency within Rekordbox or, better yet, get a Pioneer controller that has a built-in sound card.