130 WB Medium Roof owner here. We got our van back in September 2019, new from a dealer, and had the same dilemma - 130 vs 148, MR vs, HR. Drove them back-to-back multiple times, parked one and the other in my driveway, measured the cargo area million times ... plenty of back and forth before we pulled the trigger on the 130 WB MR.
I think you need to clearly list your priorities and needs, based on what are you going to use it for. We are "weekend warriors" - out of town almost every weekend, couple of 2-3 week long trips over the year. We have two boys (14 and 16 yo), so main point for us was to be able to sleep and travel 4 people (yes, you can do that in a 130 WB MR

) We Rock Climb, ride Dirt Bikes, Ski, hike and enjoy traveling, so we need garage space for all the toys, and also need to be able to tow a trailer with 4 Dirt Bikes. We do not need kitchen, sink or shower. Also, aside from my Civic, it is a second car in our family - my wife is using the van as daily commuter in the winter.
Bottom line: for our needs the 130WB MR is perfect - I have installed a second row of 3 FORD seats in the middle of the cargo area, such that I have about 5 feet between the first and second row, then I have built extendable queen size bed that goes partially above the rear seats when extended, big garage area under the bed and enough space between the first and second rows to have my kids sleep there pretty comfortable (mats on the floor or on top of a food storage boxes

).My build is pretty simple - the additional seats, bed frame, MAXX AIR fan, Webasto gasoline heater, small Dometic fridge and the usual stuff like ceiling, walls, sound and thermal insulation, house electrical system with DC-to-DC charger and a single LiFePo battery. No Solar as we do not need one. Also recently changed the tires with some bigger All Terrain KO2s. Not so positive side of the Medium Roof - I am 6ft tall and need to bend slightly my head when I stand. Nothing that really bothers me.
Works really well for us. Already got 35000 miles for the 1.5 years we have it. Awesome time out in Nature. I needed to talk my wife in to the van idea initially, but she is a big fan now

. Space is not huge, but big enough for 4 people to enjoy a rainy day out there pretty comfy.