I am considering upgrading my lense set by replacing one or two of my press styl e lenses with more flexible modern lenses. I've read through Kerry Thalmann's a nd Chris Perez's info on specific lenses, and really don't need much help there, but I would certainly be interested in focal length preferences. I would plan to keep my super angulon and build up from there. I have 13" of bellows availib le. I would guess the obvious options might be 90/135/210 or 90/150/240. I hav e also considered using a convertible, but these seem to get some bad press, and I know little about them. I think at the time my back and wallet will have to live with a 3 lens set, but might like to leave some room for a fourth. I know this is somewhat an issue of style and personal preference, but as I'm still lea rning, I'd certainly benefit from the experience of others. Thoughts on this ap preciated.