Cowasaki,
Can you account for colour cartridges becoming empty when no colour printing has been done?
I've heard it said there is a chip inside Epson cartridges. Does this just count the number of pages printed, whether b&w or colour, and when it reaches a certain total it decides the cartridge is empty whether there's any ink in it or not?
Apparently the chip in Epson cartridges prevents them being re-used.
Yes Epson realised that it was a simple matter to buy ink and then use a normal syringe to refill them and they were as new. They therefore added a cartridge chip. The chip does not always get it right though and on occasion it does say that the cartridge has less ink in it than it actually contains. If you reset the chip then it will continue to print. I found the software on ebay at 99p inc delivery. If you use an Epson printer VERY heavily it is possible to reach the cleaning ink storage tank limit!! This is a small bottle inside the printer than contains a sponge and soaks up the ink from cleaning cycles etc. This is deemed full at 15000 pages so my printer stopped working. I cleaned out the bottle and used the software to reset the pages to 0 and it worked fine again.
Basically with Epson you pay less but do get a little more work to do! With HP you pay more but life is simpler. Its a bit like the Apple/Windows thing

--- Which on that basis you would expect me to be into HP printers like my Apple computers BUT I actually have BOTH.
My printers are:
Epson R300 with CISS fitted (this is now redundant and is not plugged into any computer - if anyone lives nearby they could make me an offer

);
Samsung CLP500 colour laser printer modified by me (see my web site) so that I can refill it with bottles toner;
HP C6280 this is my family networked normal use printer (it produces acceptable photographic output; it is fast; it has a built in memory card reader usable across a network; it has a scanner usable across the network; it will scan to a memory card or straight to print) and it uses INK CARTRIDGES that are seperate from the heads, just like Epson

LASTLY I have a spangly
Epson R2400 A3 which is quite simply breathtaking in black and white and colour. I am still planning on getting a CISS for it but keep finding other things to buy instead so I am using genuine Epson cartridges at the moment.
The point is that its horses for courses! What do you really want? Perfect print everytime; A4/A3/A3+/A2; Cheap to buy; Cheap to Run; Low maintenance; Special features such as scanner, networking, memory card reader, CD/DVD printing; Compatibility with certain cameras or OSes...... the list goes on.
With my experience of the latest HP printers I would probably buy the model above my HP at just under £200 and convert it to CISS *or* buy a set of the refillable cartridges for it at about £20.
If your budget was higher and you had the need for A3 I would look at the new R1900, if the budget was even higher then the R2400/R2880.
These are just my opinions although I have used many of the latest printers and I am never a fanboy. If its good its good, if it isnt it isnt hence my examples are both HP and Epson.