the nforce chip set has nice options, but if i am correct it is slower then the via chipset.
i would go for msi, asus or chaintech. Not sure if they al have nforce chipsets, but they offer good quality and a lott of options.
How faster the ddr ram how more stable your mobo/os will be. ALso handy when you want to overclock a bit. Always buy a brand.
cl2.5 is faster..how lower the timings how faster the mem
q-tech psu's are ok for normal users. High end overclockers need to buy expensive psu'with more stabel output (>100euro).