Based on what I've read I'd go business class if you have the money. Post-op experiences vary dramatically, especially with Suporn, and you've no way to know how you'll be feeling by then. You might be fine, you might not, but do you really want to risk it? And while its nice to be with others business class more than makes up for it even without the surgery.
I'd also stay the full length of 30 days rather than 24 for the same reason. You hear of quite a few women getting revisions at2 or 3 weeks post-op with Suporn (its a good thing).