Hi Brad,
Clive has explained it all very well.
I will just add, that starting to learn imaging with a small scope might be more enjoyable, due to less demanding guiding for shorter focal lengths. One more thing I would consider is the F ratio; although F5 will require shorter exposures than say F6 or F7 (for the same aperture), but it will also be more demanding in terms of correct focus and any deviations from optical axis, for example camera tilt, will show up more on systems with smaller F numbers. Smaller scopes also weigh less, good news for most budget mounts. Having said all that, the scope you mentioned is relatively cheap, has a weight of only 4kg and its focal length of 600mm should not be too demanding for guiding.
I started imaging a few years ago with a 1200mm Newtonian on EQ3 mount, unguided...and I still had fun with it and learnt a lot, although my space photos were horrible
