Hi Horatio.
Your 26mm will give you very good views of many of the Messier objects in your 10" LX200. As Eric pointed out, at a magnification of 96x is about perfect for most deep-space object viewing.
When combined with your 2x barlow, it will give you a magnification of approx 190x, which is perfect for higher-magnification deep-space viewing such as planetary nebulas, close double stars, and of course the planets and the moon.
So, you don't need to rush
Wheer abouts do you live? Are there any astronomy societies near you?