I'll tell you this...
It's hard, DAMN HARD to buy either the Deluxe or the Pacesetter die set for rifle if the shop you are in happens to have the "RGB" set staring you down.
The RGB set is a 2-die set, the full length sizer and the seater die (with roll crimp if you swing that way) and it is the only Lee set that does NOT come with a shellholder. But the damn RGB set is like $11 or $12. That's crazy! That's like pocket lint for a pair of dies that you will never, ever break/destroy/wear out. If you have already bought the 11 shellholder set, you already have every shellholder you'll need so the RGB dies damn near jump off the shelf.
I have actually bought RGB dies in calibers I don't even own rifles for...
With that rant aside, and only choosing between Deluxe and Pacesetter, I'd recommend the one that inlcudes the collet neck sizing die. Simply put, this damn die is overpriced (compared to other Lee dies and die sets) when you buy it separately.
Even if you do believe you'll need it (say you shoot an autochucker), you should still get it for when the day comes that you own a bolt gun or a single shot. Also, a collet neck size die also doubles as a basic decapping die if you should ever find the need for one... run brass up just part way in to a collet neck sizer and it'll decap your brass with almost no effort.
