I'm looking to buy a mixer with the most/best effects features possible, as well as additional effects hardware to attach to the mixer. I am willing to pay as much money as possible. Any ideas?

Normally I use beatport.com, juno.co.uk, and tracklists from other mixes to find my music.

I'm looking for mostly prog. trance, prog. house, fidget, breaks, dubstep, psytrance, garage

Are there other websites like beatport and juno where you can play samples of songs so you actually have an idea ...