right, heres my system, check out the links so you can see what i have....
Receiver: Denon 3803 (out of production, new 3805 is apparently very good)
http://www.denon.co.uk/startpage.htm go here and click on products, then discontinued, then look for 3803 and check the specs, also check the 3805's specs, you might be able to get these in USA as well)
DVD player: currently cheapo one i won at work, will be upgrading to Denon 3910 for firewire, then upgrade my receiver to 3805 for said firewire i future, check same link but search normal current products.
Speakers: Monitor Audio Silver S6 floorstanders as main stereo Left/Right, Silver SLCR centre speaker, SFX rear effects speakers, will be getting another pair of those for side surround duties (currently been using some older Mission 700's while im broke..lol). Also i will get some Silver S2's to go in the corners for surround sound DVD-Audio music eventually.
http://www.monitoraudio.co.uk/ and hunt for the Silver range.
Subwoofer: REL Q100E Quake, the baby in their range, but certainly no shrinking violet, slightly overawed by my main stereo speakers, but i bought it as i couldnt afford any more at the time and it still provides that nice extra low end extension to music, it goes down to 20hz, believe me, you want this depth, forget those subs that only hit 35hz, no point, decent floorstanders can hit that! my S6's do 38hz not bad for such slim profile speakers.
http://www.rel.net check the Q range, but if you want good hifi performance as well best to go with the REL Strata model, for the price its pretty much impossible to beat.
edit: btw, as my system stands atm (3803, cheapo DVD player, S6 fronts, SFX rears SLCR centre, Quake sub) the cost to me was £2,550 (i've assumed the DVD player was around £100). Then add on the £300 of cabling (i went with Monitor Audios own Silver cable, very nice, decent open sound from it, better than the price equivelant Qudos that i tried) plus some stands for the rear speakers its around £3,000.
In US$ thats around £5,000 give or take, BUT you guys seem to get stuff cheaper than us generally, so i would imagine if you could get all i just listed in the USA, then it would probably be closer to £3,500. I could be wrong tho so dont take that as gospel.