Hi Soviet and others,
I had an HP 722 for several years and it did OK, but replaced it with an Epson 870 (I think) and a Canon 3000, about 3 years ago. The 3000 is still working great, but I put the Epson in the eCycling depot recently and replaced that with a 4300.
If you can find a Canon 3000 anywhere, get it... great, simple, and reliable. If mine goes, I'll try to replace the print head if that's possible.
So far I like the 4300, chipped carts aside... it seems to act just like the 3000. Same quiet printing, same long time to get started up if it gets switched off inadvertently (or if I lose juice), same good quality print, both black and color. I'll deal with the chipped carts when I need to based on info from another thread about compatible carts and refills:
http://forums.anandtech.com/me...=2124643&enterthread=y
As for leaving them on all the time, I do leave them both on except when I go away for a trip or such. I haven't experienced any trouble from them by doing that...
Noel