Muzzy phantom is an excellant choice just be sure they are sharp and fly well from the set up

I've shot three. Two with Bear Razorheads w/insert. And, the other with a 125gr. Snuffer. None went further than 60 yds.

Concentrate more on good shot placement. Bears are about the easiest animal to kill. Thru the lungs, and down in less than 70 yds. Anywhere else and good luck. Don't matter which broadhead as long as its sharp and cut on impact.

Big, Wide and Sharp 3-Blade for you, VPA 1 1/4" 250 gr, or Big Jim's 1 1/2" 300gr. also made by VPA, can't be beat.  I'll have to disagree with some on here about your Wife's choice. Since she only has a 27" draw with a max of 45#, I'd have to say stick with a good single bevel bouble blade, like the Aboyer Brown Bear or the new Grizzly single bevels.  If she gets exicited at all and doesn;t get to full draw the weight will go way down on the bow, at that point you need all the help you can get. Remember to shoot a little farther back than you would a deer, stay away from the shoulder.  RW

Have shot 5 bears with snuffers ! Have since changed to the VPA 3 blade as it looks tough.Have not shot a bear with it but love the muti blade heads.

I have had great success with two blade Zwickey Deltas out of bows from 48-55#. They have also given me outstanding performance on big feral hogs.

Never hunted bears, but my thoughts are that if the heads you are using are working on the big game you already hunt, why change? I should expect that the results would be the same with a well placed arrow.
Just my nickels worth  

Phantoms are great heads and I would not hesitate to use them .
I used a tree shark on my bear with great results and a short trail , fell in sight .

I just took a 410# monster this fall with a 53# longbow, cedar arrow with a 2 blade Zwickey Delta. 35 yd recovery. Bears are pretty easy to kill. Use whatever broadhead you like and just hit them in the right spot.

I would go with VPA 3 blades no doubt for your setup! Your wife I might be more keen on a single bevel design long and narrow two blade though as she doesn't have as much bow to help push the head through should she hit a rib dead on.

This realy helps alot lots of great info guys I think I might go ahead and use some of big jims broadheads and im still debating on hers I think maybe some grizzlies in the 200grn area will work ?!?

cant go wrong with zwickeys

Jake, I have shot a lot of bears with two blade Zwickey's or Magnus. Most have went down within 50 yrds. I havnt had blood trail problems. I have hunted with guys who have had two blade heads and thought they were sharp. I showed them one of my broadheads and they couldn't think it could be done. I use a Lansky sharpener. Its not that hard and blood trails are awesome. I don't think its so much the broadhead but how sharp they are. Good luck.