Ran a pair of little vans for electrical work for close to ten years and when the second one started nickel and diming me I had the same dilemma. Simplest advice I can give: before you pick a body style, empty out one of your current vans and actually lay eyes on everything you carry. I did that and realized half the shelf space was dead weight from a decade of 'might need it' jobs. Cut that pile down first and the van vs truck question gets alot easier. I went with a midsize truck and a topper because most of my runs are supply house hops and residential calls, and I got tired of parking a full size van in tight driveways. Bed slide was the single best add on, no more crawling halfway in to grab the drill bag. If you're hauling tall stuff like ladders or long conduit every day though, a van's rear opening height still wins, no way around that.
Whatever you buy, budget for shelving and a roof rack up front, that stuff adds up fast and always gets skipped in the initial number. And drive one with your actual tools loaded in it, not an empty demo. Weight changes everything about how it feels.