Reply to z1 or s2

i've had a s2 for a while and it's nice, but i'm wondering if I should get a z1 to use with traktor on my ipod touch and eliminate the laptop. this would mainly be for school/house parties and it would be nice to be more portable and take the laptop out of the equation, since it's expensive and heavy. also, i could keep this stuff in my car or backpack in case someone wants to party on the spot.

the only problem i noticed with ios traktor is synch doesn't sync the tracks properly all the time, but the z1 would allow cuing to check this in advance. otherwise, mobile traktor is awesome and the best mobile dj app i've used! very user friendly and well thought out

please let me know what you believe! i've got a 32 gb iPT that'd hold a fair amount of songs, i'd even consider selling the s2

ps... one other question, does anyone understand what the snowflake button does?