JP1 Remotes

I got help here before and got a 6131M for my TIVO. Got the cable but was happy enough with right out of the box usage. Just upgraded my system significantly, and need an opinion other then brick & mortar store.

I have:
Motorola 6412 HD cable box with dual tuner dvr from comcast
Panasonic th-42phd42uy Plasma monitor only but many inputs. It's great.
Denon AV-2105, all audio input and some video through here
Sony CD player, Toshiba DVD/VCR but may upgrade soon

Already hate the 3 device comcast remote, have to switch to aux to adjust sound then back to change channel. It does have a jack in the back behind the battery though!!

Dealer recommends MX-850 with the MRF-300 repeater. I like using RF for A/V control without doors open. Like PC interface. But $400 for remote and $200 for the repeater is expensive. On-line advise can be priceless. Dealer started off talking $150 for the MX-350 and now we are at $600. Also alledges that the mrf-250 has problems with the comcast box.

Need easy system for kids and spouse.

Why not just stick with the 6131m? With JP1 there isn't anything the MX-850 can do that the 6131M can't do, and you've already got the cable.

As far as RF goes, People seem to like this: http://www.surfremotecontrol.com/store/rlrx.html

There are also a number of IR/RF repeaters out there, like this one: http://www.surfremotecontrol.com/store/ir100a.html
There are also wired solutions like this or