I'd go with the Canon ipf-6450 if you are looking for a 24" printer. I like that the machine has user-replaceable head(s) where Epson does not. Epson seems to build the printer around the head making it harder to get to for even minor cleaning, and very, very expensive for a new head replacement. Yes, Epson seems far to prone to clogging or nozzle drops, and even mine will clog mid-print at times which leads to banding until I run a $$ ink cleaning cycle. Very stubborn machines overall, and I have six printers to keep up with. Local camera shop uses a large Epson 9990 and it can clog over a three-day holiday and cost $2,200 by Tuesday to get it up and running. As much as it gets used daily, seems odd it cannot sit three days without plugging up so owner goes in on weekends to run a print or two.
I know FreeStyle Photo in LA, who sells maybe the most papers on the West Coast, told me they stopped being an Epson dealer and moved to Canon due to complaints from their customers about Epson and the high service/labor costs as well as becoming disposable printers with regards to high service costs. I think this guy pretty much sums up his thoughts on an Epson 9900:
https://www.youtube.com/watch?v=Bf6kOEtgQqECanon also has some VIP program where they may offer you a reduced price of a broken and discontinued model too. Plus, I've gotten call backs and emails from them on problems encountered with an old printer. Epson is pretty much closed mouth and good luck.
However, Epson is pretty much a hackable printer that allows for the use of inks like piezeos and people who like to mix their own inks. Various carts available to trick the printer into working with sundry inks which may or not be great in operation. Canon seems less hacked and maybe why they have less problems too, although they seem to re-port with their nozzles on clogging issues so their engineering tech may be a bit better too.
When the Epson's work they are great, but when they start to head south then the guy in the above video pretty much makes his point of view about Epson. Too bad they don't make them so the heads can be easily switched out or run through an ultrasonic cleaner to clean them.
SG