Depending on your husband's Gleason score and other factors, there's a good chance that a number of treatment options will be available to him, and both of you should start reading everything you can get your hands on in order to better understand the disease and determine which option best suits his individual situation.
I don't know too much about cryotherapy, except that it is not a commonly used procedure and that its long-term outcomes may not be as well understood or demonstrated as those of other therapies.
I'm sorry you're having to deal with all of this. We've all been there and appreciate how difficult all of this can be, but please get to the library and read, read, read. The internet is helpful, but you'll find a lot of conflicting information, and some of it not all that reliable. If you can post your husband's pathology stats, there are guys here on the site who can be of great help in evaluating your various options.
Dx in June 2010.
PSA gradually rising for 3 years to 6.2
Biopsy confirmed cancer in 6 of 12 cores, all on left side
Gleason 7 (3 + 4)
Bone scan, CT scan, rib x-rays negative.
Negative margins; negative seminal vesicles
5 brothers, ages 52-67 ; I'm the only one with PCa
Continence OK after 7 weeks. ED continues.
PSA 1/3/10: 0.01