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If I may paraphrase from John Masefield, "All you need is a tall telescope and a star chart to steer her by".
A 10" or 12" Dob and a copy of Tirion's Sky Atlas 2000.0 Deluxe 2 Ed. and Sky Atlas 2000.0 Companion 2 Ed. Later on you can invest in Uranomatria 2000.0 and its companion Deep Sky Field Guide as it will give you more stars, DSOs and a larger scale.
The companions are essential as they have all the data you need on every object on each atlas. Some will argue that these atlases are too advanced but I say you will soon outgrow the Bright Star Atlas.
Forget about electronic maps at the telescope as they impede viewing since the screen brightness is too bright in most instances. As for GOTO; you will find there are those that like it and those that do not and then there are those that think it can be useful but is more of a gimmick. I am in the last group and I do not need a GPS to get from A-B on the road and for the same reason I do not need a GOTO system. I rely on good charts and a sense of direction. You too will find that by start hopping, you learn the sky much better.
If you do get large scale charts like Tirion's Sky Atlas you will want to learn all about right ascension (RA), declination (Dec), hour angle (HA) and sidereal time. Once you grasp this, reading the co-ordinates on a chart is like reading longitude & Latitude on a world map. The sidereal time simply tells you what RA ('line of longitude') is directly overhead running north-south. Note from the northern horizon it ends at the south celestial pole (SCP and another term to learn) and then is 12 hours different running down from the SCP to the southern horizon. The SCP is a point in space formed by extending the Earth's axis of rotation to infinity. There is also a north celestial pole (NCP) visible from the northern hemisphere.
I think before you buy anything, join a club and have a look through other members' telescopes at a viewing night and see what you like.
As for Dioptrx, whilst it is a great idea it is best for an individual observing session. If you have company then you will have to remove the Dioptrx for someone else unless they have exactly the same level of astigmatism. (CYLINDERS only as the AXIS is not important as the eyepiece can be rotated). Also if your astigmatism changes significantly, you will have to get different Dioptrx.
Get an eyepiece with 20mm eye relief and wear your glasses and you will not have a problem. The Tele Vue Radians are great if you can find them used otherwise the Delos range from Tele Vue is good. Note Type 4 Naglers also have good eye relief as do the larger Panoptics from 35mm upward. Of course this is all a lot of extra money but you only have to buy them once although there are many that buy and sell and buy many times over and that's when it's expensive!
If you do want some sort of electronic chart for your PC then you cannot go past Stellarium. It is fantastic and you can get a feel of the dynamic sky by adjusting the time speed. Turn on the RA/DEC grid and then try the azimuth grid. Turn of the atmosphere and you will see what is in the sky during the daytime. Get your paper charts out and look at the co-ordinate index marks along the edges and you will start to understand where and when things are. Set your date to March 21 and find the Sun in Stellarium and you will see it is at 0,0, This is known as the 'First point in Aries' although due to precession (yet another term) is no longer in Aries but now in Pisces and the dawning of the age of Aquarius is approaching. (No I do not like astrology, but I do like the 1969 song, "Age of Aquarius" by the 5th Dimension).
Anyway above all have some fun and enjoy the hobby! You don't need a lot of equipment, just a clear sky.
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