GUI for Raspi and Python to deliver Instrument panels

I am starting to work on a hobby project where a stepper motor is used 
to implement a winch for a model sailboat and the stepper moves to the 
right position with its drum to supply the required sheet for the boom 
of a sail.

The project will be using LPCXpressos, Trinamic boards to control the 
stepper and monitor the boom position using an magnetic angular sensor 
from ams.

I plan to model the system elements using Modelica in the environment 
offered by Wolfram Software with its Mathematica and SystemModeler 
tools.

To learn and study the related topics I am starting with a Raspi, as it 
is supported by Wolfram and so for my experiments I want to create GUIs. 
As natural I ran into Python, selecting to use Python 3 and Tkinter to 
use the Tk tool. Looks simple and fine, but to build widgets of the 
instruments used and have those display data Tkinter seems to be too 
simple. Am I right?

Is there a better choice the Tkinter?

Regards Hellmut