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If I may add my 2 cents worth. I have a 2000 Pewter Coupe with BSM and I think they add a really nice touch. It breaks up the side (Door) from looking like one big sheet of fiberglass.
I'm impressed that you have stats on who likes/dislikes them. The main thing is if it is a look that you like - go for it. The great thing is they are easily removable if you change your mind down the road or sell it to someone that doesn't like them.
I wanted the BSM on my '02 Pewter Coupe so I bought a used set from a forum member for $100. The four pieces sell for over $300 in primer from GM but I've been told they come with the double sided tape. The hardest part about using a pre-installed set is removing the old tape residue. I painted mine before installing and the total cost was less than $200.
You can find BSMs for sale here on the forum (used) for a cheap price. May have to be painted, but if you wait long enough chances are you can find some the same color as your car. And if you do find a set and need install instructions (with measurements), send a PM to me and I can get you the info.
I've got a set of Torch Red BSM's that I removed years ago and wrapped up carefully in case I wanted to reinstall. Well, that isn't happening so contact me if you want them, I'll sell them for a very reasonable price compared to your quote. PM me and be patient. I'm not on everyday but I'll get back to you.