Looking for recommendations

Well, it's that time of year again and I'm still thinking Iwant to give spey Fishing/Casting a go. Why, I have no idea why, just wanting to try different methods I suppose. I used to do quite a bit of single handed flyfishing in my younger days.
So here's my questions:
What length & weight would be suitable for fishing steelhead in medium to larger river systems?
With all the different types of lines out there, What's a good type of line to start out with?
What the heck is a windcutter type line used for?
I know spey set-ups aint cheap. What is a reasonable dollar amount to spend initally? I can usually scrounge up a used set-up, but brands to look for or stay away from would be helpful.

Thanks