unless printing is at least one of your top things in life or business, don't get an X900. If it is, do, but buy as much warranty as Epson offers you. Think of an X900 as you would a relationship - it's a constantly moving responsibility. Take care and you'll be happy. Neglect and you'll be burned.
My inbox holds a lot of experiences about these printers. Weighing it all suggests a few things;
1 - 4900s are different than 7900/9900/11880s.
2 - These machines are for professionals
3 - Listen to Ken Doo
4 - Pay attention to your PK to MK switch - don't let either unused ink wait at the station too long
I have a 7900 here with a blown head and a 9900 with a clogged head. Last week I took a good look at $1,700 before handing it off to someone else so I can print again. Could have been a new X900 head from Epson, even had them on the phone (which took six calls - wait till you need a new head it aint fun). Decided to buy a used 44" Z3200PS instead. The machine had an average of 60ml of ink run through each head since day one - which was 1.5yrs ago. Company was acquired, moved all but the printer to China, machine sat ever since. I bought it for $1,600, ordered 6 new printheads (cause that's how many it uses - 12 colors, PK & MK have their own heads) for $330 (15% discount for new users) which HP sent overnight for free (they sell their ink carts that way too), installed them in 5 minutes (machine auto syncs them in another 17), bought a new warranty contract from HP (on what is now a second owner, used machine), and I've been printing fascinating colors ever since. I leave the machine on, it monitors itself like Ken has his 9900 set up to do.
This machine was made for me, kind of like my wife. I am not half the professional it is. I couldn't be happier.