With Telus high speed internet(1-6mbps connection), will i lag on xbox live? PLz read

[Colin]

my question.? Ok, so im 14 and my family can finnaly get Telus high speed internet. I am extremely excited because i always play xbox live, though i would lag with the other internet i had(rogers portable.) So we will be getting the 1-6mbps connection, the best connection Telus offers isnt available in my area. Me and my brother will both be playing xbox live(at the same time), we both have our own xbox 360's. If wer both playing cod at the same time with eachother though hes playing on his and im playing on mine, is a 1-6 mbps connection good enough for that? Im worried that if my brother is online, im online, and my sister is on facebook, will it lag my connection? Even if my brother isnt home, im playing cod on xbox live, and my sister is on facebook, will my connection be a good 3-4 bars? Me and my brother both have wired connections, we use the ethernet ports in the walls in our rooms. Me my bro and my sister will be wired, my sister uses a computer that will be wired. Though sometimes she uses the laptop wich is wireless. I know this is a long question though i have been waiting forever for this internet and i want it to be good. BTW, a good connection to me is 3-4 bars, 2 bars isnt good. ALSO, is the internet im getting Dsl, or cable?