http://ecurrencyzone.com/exchange.php
I have worked with them... depending on their work load the exchange might take from 1 hours to a full day but they are trustworthy.
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rapidgator is not good for PPD anymore, if you have too many leechers, leaching your file and no premium is sold they will ban you. its what depostifiles did to me. I had up to 5000 daily DL count with DF and earned up to 45$/day. i doubt i sold a decent number of premium for them, so later i got to high to simply banned me. its kinda understandable and i dont blame them. DF had become too good for my downloaders and they were leeching like hell, so DF took the survival rout ! its the same for RG. RG is great for PPS though !