So one of my no name brand slim fans took a dump and need to get a replacement one. Should I stick with the 12" and what brand. Should I replace both?? Also current set up was a push and pull should I do the same ?

Not sure what your setup is but if you have space go back to OEM fans, if not, ^^^^

I have a set of godspeed fans with the shroud. 2 years of daily driving and still going strong. . . I recommend them. As for size, 12" is fine. Just be sure to use the shroud with the slim fans as it will help the cooling tremendously.

I run a SPAL 14" puller and a no name 12" pusher, 160 Tstat and Fludiyne radiator with ducting. I average 175* temps. I had a 14" no name on there and it didn't cut it, so I dropped the $150-175 on the SPAL and am very happy with it after 2 years.

What if I'm not running Ac?? Which should I get?? Also will the shrouded fal#325 dual set up for the 2g fit the 1g with a mishimoto radiator??

This is the pusher I run and it holds up to the 2100 cfm claim.