Choppy Playback & Export AVCHD Final Cut Pro X

Just bought a Canon XA10. When I import the AVCHD files into Final Cut Pro X and drop them into my timeline, they play back choppy. They also play back choppy after exporting, regardless of file type. Tried optimizing and proxy, didn't make any difference. Also tried converting them to other formats (Prores, MOV, MPG2, MPG4) before importing, still play back choppy. The raw files looks fine on the camcorder and also look and play fine when you open them in Quicktime.

Is there a setting on the camcorder I need to try when recording (60i, PF30, PF24, 24P/MXP, FXP, XP+), or is there another option from within Final Cut to get the files to play back smooth?

Thanks,

Michael