One place you will be able to research this is on astrobin.
Www.astrobin.com
On here you will be able to search on Lx90, DSLR, wedge and all the hardware to find out if anyone is producing good images with the setup you're considering. One of the problems with a wedge is the relative complexity of polar alignment - but if you have a semi-permanent setup it's fine. Also - you probably want to work out what kind of imaging you are going to do. The setup you have would be fine for planetary imaging using a video camera.
Cheers,
Andrew.