2405s are awesome. have 2 and love them.

if you really want to play consoles using your computer monitor id stay away from dell products since its VERY iffy if theyre hd compatible. great monitors (at least the ones with sammy panels) but not so good for stuff that requires hd inputs.

apple 23 or 30 is probably your best bet . 30 is 2500 but is definitely hd compatible. playing computer games at that resolution on highest settings would take a ridiculous vid card setup though. id honestly recommend 2x7800gtx 512s or 2x the asus 7800gtx (x2s).

anyway, unless youre getting $1500 worth of vid cards and a monitor setup over $2k i dont really understand why its coming to over 5k. considering youre not even really considering playing computer games it should not be that high.

edit you def dont need a router lol.