I have mentioned the 17d. I think the Interspace deserve a little better than the Blue Point. It is a decent cartridge and all but there are better option, IMHO, at that price. I have not heard the Glider on a Spacearm but two folks that I know replaced their Gliders with other cartridges. The Benz LO2 is a good match but out of your price range. You will not find opinions with respect to every cartridge with this table, or any table. Best advice is to audition if at all possible, or buy one with which a few have found success and evaluate for yourself. I would also suggest posting on AA. There are often more 'Not owners "lurking" there.
A side note. If one decides to go with a Spacedeck, buy one with the original "low" platter, not the "heavyweight". The latter robs the Spacedeck of its beautiful musical qualities. In fact, it doesn't even sound like the same table. Tom Fletcher has said that the heavyweight was in response to market perceptions and not an effort to improve performance.