I echo Top Dawg’s recommendation of considering a Simrad.
One, they have a great gps and navionics display, as well as often being able to link lots of motor data to them fairly easily. They are also less good as a fish finders, even though they have that feature. Thus, for you, that trade off is no worry.
Two, everything Top Dawg said! Especially If you can move up in size to the Go7 or Go9.
Three, since Bennington offers Simrads as a factory order option, Bennington makes dash inserts for them. If you can mount a new one well cosmetically on your own, no worries. However, if you want a factory OEM look, if you go Simrad, you could work with your nearest Bennington dealer to order a replacement dash insert and get the helm re-wired with the new Simrad in its proper spot. I’d expect it to be a little pricey, but also then come out looking factory. Just another option with the Simrads.
That said, if the above are no big deals, I am sure there are a lot of other good options that people might recommend. Since I have a Simrad Go5, I am simply familiar with them now.