Its all down hill here for you dannat
,one you get on the canon lens train you will need another and another!
One of my most favourite and useful canon lenses is a 17-55 F 2.8 IS lens.Not to be confused with the 18-55 kit lens.This lens is 77mm wide,amazing IQ,can focus on a black cat on a new moon night.the way it captures colour is amazing.Very handy for everyday use and the more demanding applications people have on these type of pages,You can buy a new one for around $1000 from DWI-well worth it.
Here is a astro image,This was taken about 5 months ago,been cloudy ever since