Many around here (including me) love the 1800. It only has 4 outs for external gear connection though. Two of those will be used by your monitors. Can't beat the price for the amount of inputs. Price dropped to $200 now. Guessing Tascam is coming out with a new model soon. Price of US 1641 dropped like this just before it's replacement (1800) was released.
You can still have a rack that looks nice. Here is mine:
PC Win7-64-16G i7-4790k/Cubase 5-6-7 32 bit, Cubase 8 Pro 64-bit/2-Steinberg UR824's/KRK G2-8/Event TR8/SS Trigger Plat Deluxe/Melodyne Editor/Lava Lamp/Big mean dog, cute little baby and new dishwasher!!