I like the ATs better than the CS, personally. For $300, you may be able to get into some stock AT mics instead of the SP variants.
As for mounting, I used to use a homemade croakie mount. Worked alright. But I like the sound of stereo configs much better.
So now I use a Kangol Tropic Vent Air (or something like that) cap. The mics slide into the "bill" of the cap. I've recently put together a ghetto mount for the hat - effectively coat hanger wire bent to follow the arc of the bill, and then two supports to which I attach the caps with elastic bands. This allows a stealthy stereo config which will produce much better imaging than just pointing the caps at the soundstage a la croakie mount.
Here's the hat I use - the Kangol Tropic Vent Air:
http://www.mikethehatter.com/spring/kgl1.htm (http://www.mikethehatter.com/spring/kgl1.htm)
And if you can deal with my fugly ASCII art, here's what I ghetto'd together, top view:FRONT OF HAT
/------\
/ /----\ \
/ / wire \ \ <---------- bill of hat
| \1 2/ |
| |
|(E) (E)|
| |
\__________/
BACK OF HAT
E = ears
1 = mic, pointing left (variable angle by bending the wire a bit)
2 = mic, pointing right (ditto)
The interior upside-down U thingy inside the bill of the hat (labled "wire" above) is the wire
mount I put together. I'll try to remember to take some pics sometime this week.