bike choice advice needed

stdu007

hi every one ... i'm looking for a new frame and my choise is an argon18 krypton, so my question is
how does if look like in term of reactivity, presently i'm running on a specialized tarmac elite sl2 (fact isr8) ... so most of the time i'm doing some medium to long ride (350km a week) with some enthusiastic peaople on a low hill terrain ... so what do you thing of this choise ... any other option are welcome ... thank's