Reply to midi controllers combine

hi there dudes,

i'm using vci 100 which i've recently bought with traktor and i believe it lacks knobs for some operations which would be great to do on the fly.

for example right now i can't find a free knob to assign the loop length to (1/4 beats, 1 beat, 4 beats, 16......).
also i can't figure out how to be able to run 2 effects at the same time and to be able to modify them simultaneously.
xone 1D would be perfect for these jobs, somebody could suggest something better and cheaper would be great)))))))

my questions:

1)can i operate traktor with 2 midi controllers at the same time? i don't see why not, just asking to be sure not to buy a second midi without purpose.

2)my sound interface Novation NIO often stucks at latencies less then 8ms, anybody had such issues? i guess it's not traktor (the program doesn't freeze) and the laptop is kindda sufficient for these operations : Dual 2 Duo 1.6 Gh, 1 Gb Ram.

any help is apreciated