Stuff I need to know about "Suboxone"?

I have an appt. Mon(its Wed/night) to hopefully start w/ suboxone treatment. I have abused opiates for about 13 yrs. Been to rehab a couple of times to detox off of Oxy's. Stayed clean a couple of months then right back on them. For the last 3 months, I have been strictly taking methadone(about 60 to 80 mgs/day). I reckon my question is... what should i tell my doctor? Should i stop using methadone tonight? i've read that you can't start suboxone if you have methodone in your system. I was thinking maybe I could get by the next 4-5 days eating oxy's again. Also, I need to know what kind of dosages I should tell him i've been taking b/c i'm worried to death that he isn't going to start me out w/ a high enough dose to get me through my wd's(spoken like a true addict). Lastly, It's 0 for the first 3 days and then 125 a month after that. That's alot of money I could spend on street methadone. IS IT WORTH IT?

: http://alcoholdrugstreatment.info/stuff-i-need-to-know-about-suboxone