I have a fairly large darkroom, and I don't use trays for anything over 11X14. I use wallpaper trays, and see-saw the prints through them. Trays over 11X14 are cumbersome and tend to spill easily. I second the beseler 23C or 45MX. I use both and they're real workhorses. Colour heads are available for both at reasonable prices when you decide to start printing colour.