I use Einsteins and LOVE them, but I have to admit the Elinchrom D-Lite-4 is a nice looking package. If you're going for only 400W in a strobe (which is generally plenty enough) you should also look at the AlienBees -- much cheaper than the Einsteins and just as reliable. The Paul Buff accessories are quite nice and well priced, too.
Once nice thing about Elinchrom D-Lite-4 is that they appear to have a screw-in modeling bulb with a regular bulb opening. That means you can swap out the bulb for an LED of CFL bulb and should be able to run the strobe from a battery with the modeling light on. That's one thing I can't do with the Einsteins and my mini-Vagabond batteries because the modeling light needs too much power. This might not be something you would ever use, but for location shoots, that would be a nice option to have.
I recently made a great Amazon find on background stands. Look up Linco background stands and you should find a few options. They are shockingly well built for the price (or even double the price for that matter).
For light stands, you have tons of options. The ones with wheels are generally more expensive, but tend to be designed for larger applications. You can get add-on wheels to attach to almost any stand though. Here is one set but you can get them in different sizes depending on your stand:http://www.bhphotovideo.com/c/product/272645-REG/Impact_1025_Caster_Set_for_Light.html
I have an Avenger stand like this one and it's rock solid, but rather bulky if you need to transport it. If you're just using it in studio, this might be perfect. It's also very easy to weight the legs since they are parallel to the ground.http://www.bhphotovideo.com/c/product/67821-REG/Avenger_A5034_A5034_High_Junior_Folding.html