waa...consider urself lucky as u got one of the best school in m'sia ...but then,u must not forget...even teacher from the heaven can't make u the best student in the world.it is ur attitude is the most important thing.and don't be so proud of ur school too much.

anyway,in my opinion..boarding school is the place where ur will get the most attention from ur teacher(from my previous exp)and for those outside there whom aren't well-dicipline(too lazy to do many exercise on ur own)boarding school is ur best bet because u will be burdened by ton of homework that u will not get enuf sleep cuz u need to finish ur h/w

and...about the topic,i think it doesn't matter whether it is mrsm or sbp,but i prefer going to well known and renowned school.e.g.:u got kisas(which is sbp and top 5 school)...u also got mrsm kuantan..i rather choose sbp than mrsm(not saying that mrsm kuantan isn't good,no offence here) and vice versa.good school sometimes promise better future cuz people's perception on u depend on ur school.ok here i give u some sbp and mrsm that u must-go-it-first-or-u-will-regret-if-u-dont...
sbp:kolej islam sultan alam shah(kisas),sms seremban,sekolah seri puteri,malay college kuala kangsar(mckk),sbpi integrasi gombak,kolej tengku kurshiah,sms muar.
mrsm:tun ghaffar baba(jasin),berseri,taiping,langkawi.
kolej yayasan saad(i dunno this school is in which side but i think it is private school.nevertheless,this school is no1 school in m'sia)

lastly,it's ur choice...choose it wisely.of course u can stay at ur old school w/o any problem at scoring spm with flying colour but at least give it some try if u get the offer.u can get the hell out of there anytime u want if u dislike being 'prisoned' in th school