Anyways I have a pair of really cheap rec skates which I bought on an urge 2 years ago and never really used, and I have since unearthed and made the decision to become good at them before buying good aggressive and skates which is what I want to do.
What I'm trying to do:
Basically reach an intermediate level in freestyle slalom skating
If you want to be good at slalom, why are you going to buy aggressive skates?
A good pair of slalom skates (e.g. Seba Highs, Powerslide Evo) with help you massively, and yes, rocker them. I used to slalom in Seba FR2s (which are a freestyle skate, but not a specific slalom skate). They were really holding me back, and once I got my Seba Carbon Highs I improved. If you're practising a lot, your skates will hold you back pretty quickly.
Also, you might want to try having a slalom lesson to learn the basics - try here: www.skatefreestyle.com