IMO Solitude will be the least crowded and grooming is pretty good; anything off Eagle is fun and there is a bit of a carving crew there. You can usually get 4-5 clean runs in if you hit first chair. On the downside, they hosted the FIS BX race there last year and the course really squeezed the space up, so it will pay to investigate if that will be on again this year..... I might have been more forgiving if they opened the course up to regular punters one the racing was done - some of the berms were awesome :)
Brighton much busier, but running off Great Western can be good mid-week (and there is always the night session). The Bird is ok too, but the drive up LCC can be a real hassle.