Thanks Greg, I didn't realize float valves were that small, to fit in a 4" pvc. After doing some calculating to run a Mag 12 cost about $6 a month,
Mag Drive Pumps I will go ahead with the CLS. I'm going to use a Mag 9.5 for the return, since i've heard that Mags shouldn't be used as a CLS i'm still researching what to use probably a Little Giant 3-MDQX-SC.
Here is the exhaust fan I picked up yesterday, should do the trick
NuTone White ValueTest® Ceiling Mount Fan/Light - 763RLN at The Home Depot