I'm a relative newbie to Bend area, arriving last Dec. I never snowshoed till last winter, but managed to climb Tumalo a few times last and this year, and also several treks around Meisner, Edison, Swampy and Tumalo Falls. That said (I'm no expert), but I'd put Vista Butte in line with Tumalo Mtn with respect to best views at the top (one place I have not yet hit is Black Butte - could be the ace in the hole?). It's easier getting up VB than TM, esp if you follow the xc ski paths, but still not totally a trivial 2 mile one-way trek up (via xc trail, potentially a lot shorter if you go direct up/down). But at the end of the day, the views:effort ratio are the best I've found in the area. Edison is unique with the lava and Pondorosa pines, but not much in the way of mountain views. Swampy Ponderosa trail isn't bad, esp at the top of the one decent ascent on the NE path, but the views at the Swampy shelter are nothing to write home about (Nordeen, before burning this winter was better).
All in all, Vista Butte, imo, is one of the better showshoe paths in the Bend area.