I got my XPS 15 from two weeks ago from JB HiFi on Elizabeth street (Melbourne), and $1000 cheaper that what you've been quoted ($2999). It's an awesome machine and everyone in the office is envious - to the point that we'll probably get more soon.
At the moment, the only thing that doesn't work yet in Debian Testing is the wifi... but I'm happy to wait - currently on a Ethernet-to-USB dongle.
Edit: oh, just noticed you were after the 13". It's nice, but I'm pretty damn happy with the 15"
If you would have gotten the Latitude 14 7000 instead of the XPS, then you get the Intel wireless + BT out of the box which always seems to just work.
It also has an option for an insane 10-hour battery; the default is like 6.
Unfortunately Dell never puts the Latitude line front and center on the website, so you have to know to look for them.
Latitude isn't entry-level, it's just the business line. Yes, they have the high end Precision workstation line, but Latitude models typically are built as good as or better than XPS models.
At the moment, the only thing that doesn't work yet in Debian Testing is the wifi... but I'm happy to wait - currently on a Ethernet-to-USB dongle.
Edit: oh, just noticed you were after the 13". It's nice, but I'm pretty damn happy with the 15"