Dont wait XYZ just as good.
IMHO, with the advent of xyz exchanges, theres not too much need to wait for an accomodation certificate. I guess it depends on the timing of your exchange though. I think the xzy exchanges cover most of the same areas that an accomodation certificate does. I recently searched with an accomodation certificate found something I liked and the saved a few dollars and my accomodation certificate by calling and asking for that same reservation on my xzy...
By waiting you will risk losing some of your trading power for the earlier deposit, I think .