Wow !! Such a vast amount of great opinions, info and knowledge. Thanks everyone !! I swear, this is why I donated to this place. I am members of several forums, and this is the only place I actually donate to because everyone here is soooo frickin helpful...
Anyway, so yea, looks like from all the opinions here, and factual technicals, I should just get to a place and try a 5 and see how I like it. Honestly, I just like the concept and idea of a 5 so I was gonna get one, but before I did I wanted to know if there was like one of them "general rule of thumb" things were it was a professional's known fact to stay away from them.
Now that I learned it really is just a opinion thing, with a few fact things to be weary of (muting a xtra string, more expensive string set, spacing, neck width, and the possible neck tension issue on some, etc..), I really feel obviously, over time, I should have both a 4 and a 5. But to start out on, I will just get to my local GC, and try every 5 string bass I can find, then clear my mind from opinions, and go try it to see if I can jam on it comfortably or not compared to 4's.
If I can get a decent feel from it, I will get a 5. Then later a 4. I eventually want a few really good basses that all cover a nice wide tonal pallet that also are not redundant against each other. So my hunt begins !!
Thanks again to all !!