Don't forget the smallest, lightest (mine's 380g with lens board), cheapest, wide angle for the 8x10 format: the Wollensak Velostigmat Wide Angle Ser. III f9.5 8x10 6 1/4" Focus. This 159mm lens also comes in a f12.5 version. Coated and uncoated versions exist. I got mine for $120 off eBay. Stopped down it has an angle of view of 100 degrees and an image circle of about 380mm. In landscape work I've never had to twist my Tachihara enough to lose image coverage. Here's a picture by it:
Stone and Tree, Kangaroo Ridge.Gelatin-silver photograph on Ultrafine Silver Eagle VC FB photographic paper, image size 24.6cm X 19.5cm, from a 8x10 Fomapan 100 negative exposed in a Tachihara 810HD triple extension field view camera fitted with a Wollensak 159mm f9.5 lens. Titled, signed, and stamped verso.