91 300d ac compressor replacement

[swampcop]

In the next few days I plan to replace my ac compressor as the clutch on the compressor froze. I have the new compressor and read the directions included with the compressor stating that the drier/accumulator must be replaced prior to the flush and recharge. How crucial is it that the drier be replaced? Once I have the new compressor in place I plan on taking the car to a shop to have them perform the pressure test, flush, and recharge. Should I just spring the loot for the drier or wait to see what the results are from the shop?