Not sure if people are still having issues with this. If you order the 420 with the DCT's it says it comes with a remote, but does not. You can call customer support and I am sure they will take care of you, but it is an oversite from Dell. I assume they think it comes with the cable tuners, but ATI doesn't include it. So be prepaired to have to make a call to support on that issue.
As far as the lead times on the DCT. They are a little back ordered, but Dell is pretty consistant with under promising and over delieveringfor them on most things, so it shouldn't take as long as they suggest. Just hang in there.
I have the XPS 410 with 2 DCT's. I am looking to get two more. Dell only sells them with a PC and you can only order 2 with this system. I did find a link on Sony's site that looks like you can order them seperately. I think I might try to order these and see...
http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921665246461
They show to be in stock as well...
XPS 410 E6700 (2.66Ghz, 1066FSB)
4GB DDR2 SDRAM 800MHz
512MB Radeon HD2600 XT
750GB SATA
Blu-ray/DVD+/RW
4 x ATI TV Wonder external
External eSata 3.4TB RAID 0
3 x XBOX 360 extenders