When building a new system for some OCing using air.. Is the RC-690 the best option for a new build.  
 
I found this review.. Looks like a solid case for a new build..  
 
The Cooler Master RC-690 costs $79.99 US Dollars. This makes this case a true steal, considering its features
 
 
http://www.techpowerup.com/reviews [...] 690/6.html
 
Just wondering if this is the best cheap Sub < $100 case you can get.  I see that you can have a total of 7 fans if needed but comes with 3 fans.  
 
 
What are others thoughts on the case?

Word! *gangster sign*
 
I was pleasantly surprised when I found my temps have been lower than before. My old case has a 25-cm fan which can't beat this RC690. The ventilation comes from all sides of the cases.

yeah, a great case. You can fill up the case with yate loons for 4 dollars each, Great choice.

RC-690 $55  Maybe not the best - but its a great case and an even better value for your case $$$
A lot of us are kicking ourselves that we didnt order the RC-690 back when it was $30 after rebate.
RC-690 Review @ HardwareLogic

RC-690 is a great case.
 
Other good options for 40-50$ is the CM Centurion 5 and 534... by adding 1-2 fans to either of those you can get great cooling performance.
 
I have a 534 with E2160 in it OC'd to 3.0 running cool and stable. Just had to add front intake & side exhaust. (2 x $3 or $4 80mm fans)