Personally I'm not banking on PSLF still being around in 10 years, but I have the advantage that I can will be doing IBR anyway until I finish residency in 2017, which is when the first group of people will be eligible for loan forgiveness through the program. I figure by the end of 2017 or 2018 we'll know if the program will be sticking around, disappear, or have any big changes.
Like you, I also plan to take advantage of the program if it sticks around. I think your plan sounds good, but the one thing I would consider is "hedging your bets" and considering paying more than the minimum monthly payment in the event PSLF disappears, so that you won't be stuck with a ton of interest + principle to pay. Making extra payments on the principle (you actually have to specify that when you make an extra payment, otherwise it just extends your next payment due-date) doesn't affect eligibility for forgiveness. If PSLF sticks around, it does mean you spent more than you had to. But then if it disappears, it saves you from ballooning interest/principle.
Two other things I'd like to point out:
1) You may know this already, but if you pursue PSLF, make sure that you consolidate your loans into the direct loan program. Older federal loans (which I assume you have since you're an attending) were usually FFELP and while most of those have been sold to the Dept of Ed, they are not direct loans, and only direct loans can be forgiven through PSLF. All you have to do is apply for a federal direct consolidation loan.
2) I wouldn't personally count on most hospitals being non-profits as a back-up--in many/perhaps most cases the physicians are contracted physicians' groups (for-profit). The academic hospital I trained at was non-profit, which meant the residents qualified for PSLF through their time there as they were paid by the hospital/health system. However, the physicians were employed by a physicians foundation and apparently not eligible, despite working at a non-profit hospital. Whoever signs your paycheck is the key.