I'm putting together a 4x5 kit, and have read about the difficulty in composing w the f8 sa's and grandagons, so wanted some user feedback. I often shoot around twilight and under bridges and jungle canopies (i.e. dark places), less so in full sun. Would you reccomend against an f8 wide angle, or not? What's a reasonable price for the faster 90 and 75mm lenses? Is the 65/8 sa impossible to compose with? Thanks a lot.