4 Color cameras - Dome

recommend dome type -
(sony chipset, sharp chipset)

-------------------------------------------------4 channel DVR
Motion Recording
Remote Viewing thru internet
Password protected
Dynamic or static IP support
Simultaneous record & playback

recommend dvr type -

Option to backup to external cdrw or internal

Thank you

There is so much available on the market now and the pricing is all over the place, it's pretty tough to answer this.
I think all installers have their favorites. For cameras, I tend to like Silent Witness, which is now part of the Honeywell conglomerate. They have a vandal proof dome now as well. For PTZ domes, I use Pelco.
For a good quality DVR with the features you are looking for (with a CDR drive in it) look at Samsung. A higher end unit would be Capture.

I think what is more important is dealing with a supplier that can service you quickly. There is so much product coming from China now, sometimes there is no back-up or parts in stock locally. If you don't stick to a brand name, remember, it's probably disposable.

Use static IP addresses so they don't change everywhere. I mean if you are using passwords, you don't need dynamic IP's.