I cant decide what combo amp to get. i need portable so i can wheel it into my 3rd story doormroom, And i have mainly been looking at the Ampeg Ba-500. I have read many great things about the Peavey Bam, so i dont know what to do... Please help. I can get the Ba-500 for like 600 from someone i know (plus 100 shipping). So any help please would be appreciated!