We plan on taking over 1K 40-65 rounds (smokeless) with us to the Quigley and another shoot in MT for next year's vacation and my better half is [gasp] now amenable to splurging on some sort of advanced reloading press.  We also each shoot 2x a month in offhand matches from 200-500 yds plus cowboy silhouette in pistol calibers, and the odd military rifle. --it seems i am always reloading on my 2nd Rockchucker (broke the first after 15 years).  Dillon seems to be, while expensive, very highly esteemed.  I don't know enough to make a choice between either the 550b or 650 or some comparable other brand, especially for reloading single shots in (smokeless) eg 32-40, 38-55, 40-70 SS and 45-70. Input welcome

I have a dillon 450 and am very happy with  it. When they moved up to the 550 they just added some automatic features to it. Sometimes you can find used presses available at good prices. 
I feel that you may be like me in that when you look at some of the parts on a Dillon, they may not look all that rigid, I am here to tell you that they are more than rigid enough for the job at hand.  I have managed to stick a couple of .308 and -06 cases over the years and the dillon will rip the heads off slicker than you can imagine. They are good solid well made and well warrantied presses.
Sam

Have never used either one of those but have used the Hornady Auto Progressive a lot. Has worked Very Well.

Terry

I love my Dillon 550B.  I used to shoot IDPA and practiced a lot.  I have loaded tens of thousands of rounds with absolutely NO TROUBLE.

Production rate was around 400/hour.  If you have an extra tool head and powder measure the time to change calibers is about 2 minutes or less.

You will love this machine!