Rikk,
1) If you really need to pivot your vise in the YZ-plane, get (or make) a tilting table. The one I use is 6 inches wide and acts as a 5 inch sine plate for setting the angle. I made it back in the 60's when I was an apprentice. I can work up drawings and post them if anyone is interested.
2) An "angle-lock" type vise will save you a massive amount of grief. The Indian and Chinese copies have gotten to be quite good over the past three decades. A 3 inch or 4 inch vise can do quite a bit. I have never found the rotational base for them to be of value, but that's a personal choice.
3) I have a 4 inch rotary table I made as an apprentice. It gets pulled out of its box every couple of years for show-and-tell, but the tables that get used are my 8 inch and 14 inch rotary tables. My general recommendation is to get the largest size that will fit under your quill for indexing to zero. The thing nobody tells you about rotary tables is that you will need several adapter plates that index to the t-slots to clamp your parts. Also, a set of RH-cut, LH-spiral cutters provide a "down force" cutting action when you are milling the OD of your part on the table.
Good luck!