You've done the math and figured out that paying double is doable for you. If you're cool with the amount and the payments then you sure as heck don't need my permission.
Just one little thing...remember that the second leading cause of small business failure (behind inadequate startup capital} is overpurchasing business "toys"
I mention that only because I know of three local businesses that have gone under in the last couple of months because they were drowning in debt from buying "toys" that they could have held out on.
You can call SignWarehouse's problems a function of their size if you want to. Blatant disregard for the customer, horrible communication, and a joke of a shipping department are functions of mis-management. Do a search on any sign site for SignWarehouse and see how many complaints there are compared to recommendations. Here's a nice place to start.
http://signs101.com/forums/showthrea...=signwarehouse