The 150mm is considered normal focal length in 4x5, as the 50 mm is in 35mm. If the 110mm too costly, you may find a good lens in the 120mm area. One of the problems figuring focal length to focal length is the odd size of 35mm film. You have to figure for the wasted film at the ends of the 35mm size. If you like the wider lenses, 90 to 135 is a good choice. The 210mm gives good perspective with 4x5 and is used by many as a long normal lens. It the lens of choice for many LF shooters. If I can offer an opinion, I would get familiar with the different focal lengths used with 4x5 before investing heavily in lenses. The 110mm you mention is an excellent lens, but you may want to make sure it fits your shooting preferences. Regardless of your choice, welcome to the world of LF.

Regards,