Ok, these are my opinions on the subject of mixers..
If you are only ever going to be using 2 channels at once, get a battle mixer. You get a hell of a lot more build quality from them...
Take the pioneer 600 for instance...

Loads of channels - (never get used)
Shite build quality
Crappy fx
Shite EQ
Can be quite fiddly to work with
Last about 6 months before things start going wrong (Fader crackles etc...)
Im not sure on the cost of one of these now, but im sure its around the 500 mark..
Now take a decent battle mixer of the same price, the Ecler Hak 360..

2 channels (no wastage)
Best build quality ive ever seen
Quality faders which will last 5 years + when hammerd with crabs every day
Neat, uncluterd design with everything in the right place...
One of the best EQ's ive used
Fx send, for some decent fx unit
If your a turntablist, it will last years...If you just mix on it, probably a lifetime..
Ive had the ecler hak 320, the old version of the 360, for nearly 2 years now, and i have hammerd the shit out of it crabbing, transfoming, beat juggling, dropped it a few times, etc.. And its still perfect, and all with original faders.. Ok, its desgned for the turntablist, but it mixes a hell of a lot smoother than most of the so called "mixing" mixers that i have used in the past. Every event i have run, i have always had 1 of these in each room becuase i know it is a quality mixer, and i can rely on them...
End of the day tho, its up to you mate, but i would seriusly see if you can have a go on an ecler hak 360.. You never know, it might turn you into a turntablist...