I've found the HP B9180 to be a great printer. I don't print a lot and I don't print regularly, but have been doing test prints for several months and just did 20 or more A3+ prints, all with the set of inks that came with the printer. I think it's really cheap to run and the quality is really good. In fact, I've not thought about it much since I bought it - it's just something I use and take for granted.
The additional ink that comes with a 17" printer like the 3800 isn't always consumed in the first year of use. I have no direct purchase price details of the B9180 and the Epson 3800 but just counting the extra ink isn't always the best choice. Every black ink cycle PK>MK>PK takes 6 ML on the 3800, 13 cycles is one cart content. The initial ink loading after the purchase loads both black channels + twice the LK channel. 17" printer ink tubes are longer than 13" tubes. Cleaning cycles do the job twice on the LK channel due to the system. In general the Epson 17" wastes a lot more ink than the B9180. The heads of the B9180 are user replaceable and like on the Z3100 (same heads) they last a very long time.
About 18 months ago I collected the Euro prices per ML excl. VAT. It will have shifted meanwhile but nevertheless.
0,91 Euro per ml Epson 1400 etc (Claria) 7,4 ml = 6,47 Euro
0,73 Euro per ml HP 9180 28 ml = 20,55 Euro
0.73 Euro per ml Epson 2400 13 ml = 9,44 Euro
0,45 Euro per ml Epson 3800 80 ml = 36,30 Euro
0,45 Euro per ml Canon iPF5000 130 ml = 58,80 Euro
0,41 Euro per ml Canon iPF9000 330 ml = 135,57 Euro
0,37 Euro per ml HP Z3100 130 ml = 47,47 Euro
0,33 Euro per ml Epson 9800 110 ml = 36,38 Euro
0,32 Euro per ml Canon iPF9000 700 ml = 226,29 Euro
0,29 Euro per ml HP Z3100 twin pack 260 ml = 75,50 Euro
0,26 Euro per ml Epson 9800 220 ml = 58,09 Euro
A rough estimation (Edited): Count 1 ML per A3 size for the B9180 and check what you print in a year. A price difference of 500$ on 400 ML more ink is in my book 1.25 $ per ML. The same amount of ink in B9180 carts will cost approx 400 $ and will last longer + can be purchased when needed, this year or next year. It is only when you print the equivalent of 350 A3 or more prints that the 3800 will break even to the B9180, after that the 3800 could become cheaper.
While the 3800 is an interesting choice versus the 2880, it is less so if compared to the B9180.
Ernst Dinkla
try:
http://groups.yahoo.com/group/Wide_Inkjet_Printers/