the ai booster and ai suite are generally deemed by the experienced OC's to be crap hence the suggestion of tweaking voltages and timings in BIOS..
Its really nothing to fear it just requires time and patience...Also remember just because your mate can get 4ghz doesnt mean you will there are lots of factors one must take into consideration when overclocking..
Also, dont be pressured to OC its not like you have to 100% if you are happy at running your PC at standard levels then its fine..
Why dont you go to the overclockers thread and print off the beginners guide to OC'ing and then decide whether you want to OC..
Finally if your PC is running fine i.e. no random restarts or freezing that crashes your computer again you dont need to bother with mobo temps. Mobo temps are monitored when again you want to overclock to avoid you burning out a component such as CPU, mobo or RAM..
Relax, you done a great job on your first build and it appears as if you have not encountered some of the headaches newb's usually do...so well done, put your feet up and install all the software you want and then enjoy your PC for a while before you look into overclocking..
Whats the spec of your PC?