Is the line 6 spider II 75w loud enough for a rock band?

i think im getting the 75 watt version one next week or should i save up 60 quid more an get the 120w one? i was just wondering if you can hear the 75w amp over a full size drum kit because my current 30w amp you cant hear over it. i havent been playing that long, about a year and i have an ibanez GAX