Joe.....sounds like Sharp1 is bias on the 453. I agree with sharp1 that the 453 is a nice unit. But doesn't any 45ppm unit run 5000-20,000/mo? That is the norm for that segment. I should know I worked for Sharp and sold these exact systems. But I have to say if you have an customer that is already not happy then you try to sell them a system with all those extra bells and whistles when they don't want or need then....well you are adding fuel to the fire. I sell against Sharp all the time and have won with many different Canon solutions. Check out the Canon 3235i or 45i if you can get access to these? You might even be able to use a 3235 or 3245 and save the customer some money. If your client has large PDF files they need to print.....there is no driver on the market that compares to the rip time of the Canon UFR (ultra fast rendering) II driver....check it out on youtube and you will see what I am talking about. Watch the video that rips a 12 page, 46MB PDF in 44secs.
I have replaced a few Toshiba's with the 3235i and 3245i's. Customers love them because they are very user friendly!