We use a Pearson chute and self catch head gate.  We really like it, but wish they had some type of neck extender.  It seems to be the best manual chute I have run.  The Hydraulics are great, but the Pearson hydyaulic runs about 11-12 thousand $ last I heard.  We paid 2350 for our chute about 3 years ago.  We have it set in front of a Linn (post and pipe) tub and alley.  I really like the on handed lever for changing the width of the alley.  the whole side pivots and slides easily.