I also have a 109B20 and I find it to be a solid, competent monitor. I also have an aperture grill monitor, but I don't like the stabilizing wires.
If you can purchase a monitor at a brick and mortar shop, do so. The immediate gratification and the shipping cost and time saved, if needing to RMA, will IMO, offset the price difference. You will know if a monitor is misbehaving shortly after getting it up and running. So, if there's a problem, you can return it immediately and get it exchanged.
I agree with everything NATO has said. I paid $250US for the Philips, new @ Office Depot.