G'day Tudor,
I've never tried using Taki's star atlas. You could try printing out a few selected regions and using them for a couple of observing sessions before deciding whether you liked it enough to print and bind the whole lot. As for constellation markings or not, that is purely personal preference.
If you look through the focuser without an eyepiece in it can you see anything other than the inside of the other side of the upper part of you scope? If the answer is "No" then you probably don't need a shroud for light baffling purposes. However, a shroud can be useful for holding dew at bay on soggy evenings. By all means try making one yourself if you want one.
Regarding eyepieces, I'd suggest looking through as many different eyepieces as you can before laying out too much cash. Take it slow and get a sense of what you like and don't. For example, do you want a really wide field of view or don't care? Lots of eye relief or don't care? Some playing with other people's toys can help lessen the amount of buying and selling that follows
Best of luck with the new scope and clear skies!
- ricky