i currently have a peavey 410tvx cab (350 watts @ 4 ohms). as of now, i am powering it with my tnt115 combo... it puts out 200 watts at 2 ohms. i would like to get a new head so i can bring my 410 to college and leave my combo at home. my funds are limited to about $400 (like i said, i'm a college student). i was thinking about picking up an ashdown mag 300h (300 watts @ 4ohms) or a GK 400rb-III (240 watts @ 4ohms). i play mostly rock, some blues and a little jazz. would these be under-powering the cab? currently i am not playing with a band.... maybe shortly. i play an american hot-rodded p bass. i would like to hear any and all opinions.