Went shopping and got serious sticker shock!

Bought a Ridgid portable table saw at Home Cheapo and am now thinking I also need a power miter saw for crosscuts/chopping, and for miter cuts.
I am just starting to get into woodworking and don't want to spend a fortune, but I also have a tendency to upgrade very shortly if the toy does not perform.
Any suggestions on a decent power miter saw or brand which would work well for the weekend woodworking warrior and last?
Hopefully before winter sets in I will also build a 150 sqft shed to replace a small metal shed which is falling apart BUT does for some reason have a 20 amp dedicated circuit feeding it an outlet and light.
