You can not have a platter installed for shipping; it would make the table hugely prone to damage. My god, 'installing' a platter is simply resting it down over the spindle.
Installing the cartridge is simple enough. The Denon cart even comes with a little overhang gauge to make installation super easy. I also recommend getting a Shure cartridge mass gauge so you can set the tracking mass perfectly. KAB would probably install the cartridge for you if you sent it to them. I don't think they carry the DL-110 Denon, and the Denon is the best cartridge anyhwere near it's budget, so I would not recommend any other cartridges until you get to a much higher price point, and I expect KAB would try to sell you on another cartridge since they sell them, but the don't carry anything in the league of the DL-110.
If the Technics SL-1200 is above your price now, you need to forget new. You will have to go used to get a great table under that price range.
-Chris