What do you mean by "relatively inexpensive?"

I would look for a Audio Technica AT4033 as a good large diaphragm condenser, I think they run about $300 or so. A lot of companies are putting out cheap condensers now, but the qulity control can be pretty bad, so I suggest looking at this site if you want cheaper mics, but with a higher qulity than if they were bought elsewhere:
www.oktava.com (The Sound Room). This place is nice because they actually test the mics before selling them.
What will you be recording mostly?