Hi Neil,
I have a friend with Gleason 3+4=7 who has been on active surveillance for some years, just having regular PSA tests and MRI scans.
I was Gleason 4+3=7, PSA 16 odd, and was told in no uncertain terms that A.S. would not be appropriate in my case, which turned out to be correct as there was some spread outside the capsule.
A few weeks or months here or there in your situation will not make much difference to your eventual outcome.
What will however, in terms of continence and potency, is the skill of your surgeon, so I urge you to research the experience and results of whoever you end up with.
Cheers, John.