The Xmod charger (the one I saw incase there are multiple) looks very cheap, looks like its based on an old overnight charger style... hopefuly the electronics inside are very different.
Rayovac Sells the I-C3 as well, but they removed the Rayovac logo and replaced it with Radio Shack... hopefuly the cells and charger are identical and no short cuts were taken...
I still see it being better to buy the I-C3... over any other type right now, for those that have no charger or rechargeable batteries at all etc... you wont have to upgrade later...
For 2 cars...
$29.00 I-C3 Charger
$12.00 for I-C3 AAA for first car
$12.00 for I-C3 AAA for 2nd car
(you only need 1 set per car when they charge in 15 minutes!)
=
$77 +/-
(You will also have 2 or 4 AA cells included with the chargers, a 5 or 10$ value)
if you were to use 2 cars with the xmod charger:
$25.00 ? this about what Xmod charger is?
$25.00 ? for a second Xmod charger!
(Gota have 2 chargers for 2 cars if it takes an hour or so to charge, other wise it would be 2 hours between "races")
$10.00 for spare set for first car
$10.00 for spare set for 2nd car
(you need at least 2or3 sets for each car so you can use one while charging the first)
=
$70.00 about... +/-
(not totaly sure what the Xmod charger comes with in the way of other batteries? I counted at least 1 set above)
My goal is to reach the point of NON STOP use, not having to wait for the cells to charge.. 15, minutes is basicly a 0-wait, since it might take you that long to pee-clean the car-drink a pop, and be ready to run again

.
I of course was ignoring whatever cells are used in the transmitters....