Hey there vmx1000 brother! :P
If i were you and wanted to spend my whole budget, I'd go for the reloop rmx40(so, 4 channels) blackfire.. It has got effects and enough possibilities to expand your set.
Or an other option would be to buy a good state second hand pioneer djm400, 2 channels but lots of effects and a 5 bank sampler! You should find enough info of it here on DJR..
If I could find a djm400 in a great state second hand for a good price, i should take that one..
@dodig: maybe a little bit over budget? :P