Yamaha DTXpress/DTXplorer/DTXtreme

Pete:
I would think that you could find another DTX I module for less than 
$450 (US). I recently picked one up for about $230, but I made an 
exceptionally good deal.

As far as the crosstalk goes you just need to make certain that the 
pads connected to module one are isolated from the pads connected to 
module two. When using only module you can dampen crosstalk with the 
Rejection parameters, but that option disappears when a pad connected 
to one module is causing enough vibrations to trigger a pad connected 
to the other module. Reducing the gain and and increasing minimum 
velocity for the affected pad can reduce the amount of crosstalk, but 
it will also limit the dynalmic of that pad.

There are several ways to isolate the crosstalk. One is to have the 
pads from different modules mounted to separate rack arms. One is to 
have everything on the left side of your kit go to one module and 
everything on the right side go to the other. Another is to isolate 
cymbal stands and such with rubber inserts to lessen vibrations.

I lessened the vibrations in my kit by filling the rack tubes with 
that expanding foam and filling the cymbal uprights with cotton. That 
seems to have cured any crosstalk issues for me, while still having 
the gain and velocity level where I like them.

Hope this helps, and keep looking for module at a better price. 
They're out there!

Stephen