need gm help

[Nekira Sudacne]

The two of the three you referenced--Rifts Ultimate and book of Magic--are the core books. technically, you can play with JUST rifts ultimate, but the spell section in Ultimate was cut severely for space, so the book of magic is needed for the full spell list. The game masters guide is useful, however, you should know that Rifts Ultimate edition came out several years after the game masters guide and has updated rules. so whenever you find a rule in the game masters guide contradicting rifts ultimate, it's rifts ultimate that takes precidence.

after that, well, you pretty much got most of it. Other books you MIGHT want to get are:
Rifts Sourcebook One Revised: Just a great product with a lot of helpful things for a game.
Spirit West: the indians part of the cowboys and indians theme the west has going. Note that spirit west is generally panned as not one of palladium's better products, so you can skip it, still, it does have useful information.
vampire kingdoms Revised: what's south of the Rio Grande? A lot of trouble. this book has more
Rifts Black Market: Bandito Arms is a major weapons manufactuer in the new west, this book has more information on their operations
Rifts Mercenaries: A catchall book. The New West is covered with city states, baronies and petty kingdoms. Mercenaries factor heavily in the political and economic realities of the region. this book tells you how to run and operate a merc company as well as outlining several merc groups you can run across
D-Bee's of North America. Not exactly a monster manual, but provides a lot of interesting new creatures to flesh out your world with.

None of those are mandatory, and getting them all will run ya a pretty penny indeed. I would recommend grabbing sourcebook one revised and vampire kingdoms at the least, two books I find I use a lot in any Rifts game. Rifts Mercenaries is also a great book with useful information on how mercenaries and adventuers get along, and a lot of new gear to use.

[Akashic Soldier]

Rifts Adventure Guide, Spirit West, and my personal favorite Rifts Black Market.

I wouldn't say you need them but they'll really help flesh out the setting for you and there is a lot of cool **** in them.

[Killer Cyborg]

been out of rpg for years and getting back in gming rifts in a few months i have the ultimate edition , gm guide , and book o magic my players expressed interest in the new west any one no of any other books i might need to git ?? or should have before getting the new west thanks in advance

What type of play style are you and your players into?
Because the tone varies a lot from book to book.

[say652]

i would use the RUE book and my imagination,to much structure kills the creative mind. i like the CS war campaign book and lonestar might alsocome in handy.