Well I can't take it anymore. The driver's side catalytic convertor in my '95 540 is so loud its embarrassing me and it wakes up the neighbors. I want to order an aftermarket cat and would like you experienced folk to confirm the part number before I do. I was all over the Magnaflow/Carsound site last week and believe I have found the correct one. This appears to be a good free-flowing replacement according to the masses. Does anyone have any other opinions on other brands? Here is the one I found.
Carsound 53005 - Round 2.25" in/out no AIR ----OR-----
Magnaflow 54305 -(same one except mirror finish).

-I have seen some comments that a 94005 Oval shaped is OK, but I don't believe its the same as the current one on there. Any advice?
-I found a local shop that seems experienced at welding and should be able to install it for $50-$60. Does that seem reasonable?
-What are your opinions on changing out both? I don't really want to, but if ya'all recommend it I will surely consider it.
-Do you see any potential problems with the O2 sensor? I don't forsee a problem but definately want to keep it from setting off my check-engine light.

Thanks for any advice - hopefully I'll be able to sneak into the house by the end of the week like I used to be able to do.

-jack