I am looking to purchase a 200 watt combo, and I have the option of buying an Acoustic B200 115 combo, or a Yorkville BassMaster 200T with 210 Combo. I am looking to purchase an extension cab sometime in the near future. I like the idea of mixing a 15 with some other size speaker. So here are my questions - which is a better amp, and is it better to have a 15 speaker on top or on the bottom? Thanks for the knowledge.