Reply to new to dj - few questions

Hey guys, Been bedroom djing for a few months now, just using virtual dj with a cheap $5 usb soundcard so i can PFL my songs. recently downloaded trial version of traktor, it seems more technical but obviously better in the long run. I like doing it as its fun and i want to improve and take it further.

Ive done research for midi controllers and keep coming back to the vci-100 or the total control from numark.
The vci seems better but also costs more.....

Just wondering the vci works with virtual dj aswell? im aware it comes with a version of traktor, i believe " LE " ?

Once i have either controller, do i still need to buy another soundcard aswell? because currently i cant get to PFL my songs in traktor, and dont want to have to go and spend another hundred ontop of the vci unit to get it to work properly.

Or should i just purchase a second hand set of cdj's and a mixer for roughly the same price as the VCI-100 unit instead, and focus on that aspect, since this seems kind of pointless in the long run.