Yay um I put a 120 why b/c i am crazy like that it dropped my temps 2 or 3 degrees celsius deffientely worth the effort
there's nothing crazy about it! I'm not sure if 2c was worth the effort as that is a negligable difference and is within the margin of error for whatever you are using to monitor your temps.
Instead of adding fans, you may want to consider changing placement and direction of existing fans.
you may also want to consider water cooling, when i water cooled my CPU, my case temps went down 12C, the CPU is the biggest heat producer and a standard air cooler just blows that heat around your case heating everything else up.
an air duct mod is another effective way to lower case temps, again by lowering the CPU temps, you lower the whole system temps with it. you can make an air duct out of any tube. a straight or tapered large platic cup works well. you need to cut a hole in the side of your case where the CPU is, then mount the cup (or other tube) so that the CPU HSF sucks cool air from outside the case instead of hot air from inside the case. you could also remove the fan from the CPU heatsink and mount an 80mm fan to the case where the duct is, this will theoretically "suck" the heat away from the heatsink instead of blowing onto it. I have never tried this myself, which is why it is "theory", but many Dell systems use an air duct system with a passive CPU heatsink and a case mounted 80mm fan.
In the end what matters is what's more important to you... noise level, cost, temps. personally noise level is the most important to me, I don't want my computer to sound like a jet turbine. I have 5 fans but they are all running on 7v to make them spin much slower, collectively they still move air and I can barely hear them