I'm brand new to commercial painting and weighing what sprayer to invest in. I've already bought the 210ES (still in the box) but someone recently suggested upgrading to the 490 w/ digital readout. I def like the idea of a digital readout...would certainly help a new guy like me with reproducing consistency, as I really don't have a 'feel' for things yet. But does this Graco 490 sprayer otherwise justify the extra $500 over the 210ES? What other options does the 490 have over the 210? Also, what other sprayer would you suggest that might be less expensive than the 490 but still has a digital readout?