For good quality printing, Epson and Canon should definitely be on you list of brands to consider. I would probably avoid Lexmark, but that's just my personal opinion.
Whatever the make, when you've found a model you favour, I would suggest checking on the internet that compatible inks are available for that specific model (don't just go by the ink cartridge code), before parting with any cash.
A set of 6 Jettec brand compatible carts for my current Epson printer (a px720wd I picked up cheap just before the new model was due out) costs me about £16, a set of genuine Epson ones is around £50! while a set of 6 no-name compats off ebay can be had for under a fiver. If I did loads of printing I'd probably look into refillable cartridges or fitting a CIS.
Incidently, if you go for more than about a week without using an inkjet, I'd recommend turning it on and printing a page (a nozzle check would do - but I usually find some shopping vouchers to print

) to prevent the cleaning pad and the nozzles from drying out and clogging.