I'm going Bogen/Manfrotto and have narrowed down my selection to the following legs and heads, but still have some questions. If anyone has used them, let me know if you think they're worth the investment. Legs: 3001BN or 190XB Is there much of a difference between the two? Heads: 804RC2 or 3047 I'm leaning towards the 804RC2, but the the 3047 has tension control. Is it necessary? The 3047 seems bulky and could be a PITA to carry around. Last question. More of an opinion. How do you carry your tripod--with a shoulder strap, or in a bag?