I'm certainly no expert- but I have a Topeak Turbo Morph w/dial gauge & like it a lot. IMO, the dial is easier to read than the "slide in a window" types, plus it was just way too cool to pass up. Bonus: that dial gauge comes on a great pump! Factory claims up to 160 psi capacity- while that may be optimistic, it should certainly inflate up to 110 psi OK. It's about as close as you can come to a floor pump that's easy to clip on your bike frame. Yes, there are many other good pumps, but this is my favorite- love that dial gauge!
How big a deal is a gauge? I think you should also get an accurate pencil or dial gauge(or borrow one), & then note any discrepancy between it & the pump gauge. Once you've found any difference(both my turbo morph, & my floor pump, measure right on with my Milton pencil gauge)just use the pump gauge to fill your tires, & save all that disconnecting, checking pressure with a separate gauge, reconnecting, checking again, etc. Short version- a pump gauge isn't absolutely necessary, but it sure is handy.
I've got the Road Morph. It's really great for a smaller pump. The sliding gauge isn't so smooth in that it kind of jumps in large intervals, but for getting to 110 or 120 it's fine. The pump is easy and fills to 120 quickly. Two other complaints, though: (1) there's a small clip for you to stand on while you pump, which doesn't clip back to the pump after a few uses on uneven ground (2) the pump holder is a bit big and zip-ties to your frame, and can interfere with brake cables or hit your leg as you pedal. But these are small downsides.