Radiator Help

[Vincent Bourdin]

Hi everyone,

For the last couple of days I've had the feeling I would soon have to spend
some time under the hood of my NX2k ...
Lately when coming home from work, I've been noticing the temperature gauge
was getting closer to the H mark during the last 10 minutes of my commute
while stuck in city traffic.
At the same time, the idle was going from an accurate 750 RPM to almost 1100
RPM!
Surprisingly, turning on the heat in the car (not too pleasant as the
weather here in Boston is getting in the 70s ...) the gauge would go back
down to the middle, and the RPM would get closer to 750 again!
This strange phenomenon would have been the subject of my email to the list
until ... this morning, when I noticed that my car was loosing coolant at a
steady flow!.
Bottom line, looks like my radiator is seriously leaking, and I need to fix
it!
My question to the list is then, what should I do?
Today, I've been searching the web for radiators, and although I could spend
the $340 that appears on the Common Parts and Accessories page of sr20de.net
(probably same as stock price), I was curious to hear if there were cheaper
alternatives.
Given that I'm only using my NX2k to go to work and back, I don't feel that
I need the racing radiators that range in the $375 (Courtesy Nissan,
etc...).
The cheaper radiators from RockAuto.com and Speedy are down in the $150,
which sounds more reasonable, but then again, I would like something that
works, and that can last for awhile...
Do you guys have any suggestions/experience/advice you can share with me,
and help me make the right choice?
Also, is it possible to repair a radiator? Is it reliable?
Any help would be appreciated.
Thanks,

Vincent.