I second D-Lites. The D-Lite 2's would be the cheapest and you get 2 x 200 watt strobe, 2 decent sized softboxes, 2 stands, and sync chords, oh and they provide the first set of replacement bulbs. Next up from there is D-Lite 4, everything I just mentioned except the two strobes are 400 watts each.
Keep in mind that depending on your camera you will have to buy wireless triggers, the best suited for Elinchrom is obviously the Elinchrom EL-Skyport, but industry standard is Pocket Wizard. I've heard that Pocket Wizards will last 10 years where as the EL-Skyports more like 2.
Risregard the triggers If the 50D has ports the 40 prob. did