Need a new Mobo and also PSU issues

Here is my current setup:
-Intel P4 2.0ghz
-Antec TruePower II TrueControl 2.0 550w
-Gigabyte GA-8IEX rev 2.0 mobo
-6HDD's (all Ultra ATA 133), 2 hooked up to mobo (both 80GB), and the other 4 (ranging between 160 and 300 gb) hooked up to a Promise Ultra 133 TX2 controller card
-Nvidia geforce4 ti4200
-1 gig ram
-DVD R/RW

I am looking to buy another Mobo to replace my old one, since it does not handle SATA, PCIe, better than PC2100 ram, and the northbridge fan connector is broken. I don't know what mobo to get to accomidate all the stuff I have, so If anyone can suggest a good one for around $100-$150 that would be great =)

Also, I just bought a new 550w Antec PSU to replace my old 485w Enermax that blew, but I am a little confused with the controllable voltage settings. It seems that I can set the +3.3V and +5V to exactly those values using the front control panel, but whatever settings i use with the +12V, it fluctuates between 11.23 and 11.67V. I am using Sisoft sandra to read my voltages. Should I be concerned?

Thanks for your help! ^^

on newegg.com you can do an advanced search for motherboards, and the search can narrow down your choices based on what options you need/want. go there and do a search. they have a large selection, decent prices. and top notch shipping and service.

i shall not help you for you use intel, were you using AMD, i would gladly go to the ends of the earth.

>>3
You are silly.