Yep that sounds about right for the view in the 28mm, it's when you get to globs and nebs that it starts to get interesting. Wish I had worked it out... would have got an EQ6 instead but the HEQ5 pro is a good mount. Seeing as the 28mm is a 2" eyepiece I got a GSO 2" ED 2x barlow which comes with a 1.25" adaptor, then all you need is a 20mm and 15mm to start with
Should get some good views then. Matt