Video cabling advice needed

[Mark Clark <nospam@xxxxxxxxxxxx>]

Hello.  I'm looking for guidance on a project I want to do.  I am new to
this type of thing, so I am need any tips or suggestions you have.

I want to combine DVD, TiVo, satellite, and OTA antenna into one using a
modulator.  I would have about 4 coax runs to make to TVs, each 50 feet
or less in length.

1) I've found the Channel Plus 5545, Channel Plus SVM-24, and the
Channel Vision E4200 as some possibilities (the SVM-24 being stereo,
which would be a plus).  Any suggestions on which one is better?  Are
there any others out there that you like better?

2) I've looked at wiring examples for these modulators, and I don't know
if I'd also need something like the Channel Plus DA-8200BID or 8200HHR
which they show.  Would I need an amp with this setup?  If so, what is
the difference between BID and HHR?  I don't know why I would choose one
over the other.  I'm also confused about the filters they show (mostly
on the OTA feed), and if I need them or not.

3) I want to be able to change channels, turn the antenna rotor, etc.
from anywhere, so I also need an IR solution.  I was thinking about
using something like the Harmony 890 so I wouldn't have to have IR
receivers, pyramids, etc. around the house.  My question or concern is
if something like this would be able to blast the IR signals to all the
components if I have them on a shelving unit or bookcase, etc.  Do you
have any experience with the 890?  Do you have any other suggestions on
how to do this?

Thanks for any help you can give!

Mark