Tim,
I've 2 suggestions on the CF Cards - Pretec CF receiver or the Haicom CF Card - check out the link below which gives you TTFF results on a number of different receivers. This might help you make ur mind up!!
http://www.pocketgps.co.uk/ttffcomparisons.php
Also there shouldn't be any issues with copying your files from CF card straight onto the SD card - do you have a card reader? This will do the job faster too!