Sounds like you did everything by the book. I really doubt that you will have any long-term problems. Are you handy with tools? Once you have the lower engine plate off (the big aluminum one), which is pretty easy to do (I've done it) access to the oil pan it pretty simple. Maybe you could save a few $$ for something else for your car.
Cost for the pan from Penske is $1018, not cheap here either
http://www.penskeparts.com/DiagramsM...5&rnd=03192010