Over the years, I have cobbled together a surround sound system - adding bits here, replacing parts there. As a result, I have many different speakers, but don't know how to combine them to make the best possible setup.

Here's what I have:

Marantz RG150's: These are older floor speakers I recently got when my father bought a new system. They've got 12" subs, 4" liquid cooled midrange, and 3" liquid cooled tweeter (I'm really just reading off the label so I don't know how much of this is significant). They'll hold 8 OHMs.

Bose 101's: self explanatory. I was running these upfront.

Bose 100's: First speakers, had them in back.

JBL TLX Movie surround - My first surround sound setup. I'm currently using only the center box from this setup.

Yamaha YST-SW45 subwoofer.

Kenwood VR - 605 tuner

When I got the Marantz's, I moved the 101's to the back, eliminating the 100's. But other than that, I'm not sure what the best combo of these components is. Do I still need the subwoofer with the bigger floor speakers? Should I be using the JBL's in place of the Bose? They handle 8 ohm's, matching the big speakers up front, but I had pretty much assumed them inferior to the 101's at least. Is there anything else I should consider?

Thanks for the help, and sorry if these are the sort of questions that make regulars roll their eyes .