Different CME options?

In all seriousness, those tips are my favorite and there's other options for a different sound. You can take the CME and lower valence off and put a new catback on. You'll have different tips and a different sound that way. Or you could just buy a different catback and take it to a shop where they can put it in, but mate it up to your current CME tips. That's a popular option too.
As far as other brands go, there are all of these different catbacks:
B&B
Bassani
Borla
Borlamouth (mix of Loudmouth with a Borla XR-1 muffler)
Corsa
Dynomax
Dynomouth (mix of a Loudmouth with a Dynomax resonator)
Edelbrock
Flowmaster
GHL Motorsports
GMMG
Hooker
MAC
Magnaflow
Mufflex
Random Tech
SLP 2OTL, Dual-Dual, Loudmouth, and Powerflow
Spintech
TSP Rumbler
Look through LS1sounds.com to find a sound you like of those. I currently have Magnaflow, but will be switching to SLP's 2OTL for a smoother sound. If I were you and you wanted a different sound, I'd just buy a new catback or muffler and have a shop attach it to your current CME.
step up from the factory Z/28 exhaust. But you
may find it annoyingly quiet (at least until you
uncork the front, mine sounds a lot healthier now
that the stock cats are, umm, low restriction).
I will be keeping mine when the headers go on, it
whispers "solid citizen" as I motor past the sheriff
and the cutout is there when needed.
There is the "factory" version and a couple of
quad-tip ones too. Near as I can tell only the
post-muffler plumbing differs from the dual-dual
SLP option (extra 90 bends and the aluminum
double-bell casting). I believe there are different
valances between the stock, and the aftermarket
kits; seen some complaints about the 2-piece
aftermarket ones but don't recall the specifics.
You can see CME take-offs pop up occasionally
here in the Parts For Sale section and on eBay.
Taking the back pieces off cleanly is tough, the
install uses old-school crush style muffler clamps
and this means something may have to get
hacked to get it off. Also the "bells" are tied
together by a fairly brittle web of casting that
will break if you grief on it. Check condition of
a used piece and be sure it's not messed up, or
buy it at the right price given the need for some
clean-up welding & new pipe etc.

In all seriousness, those tips are my favorite and there's other options for a different sound. You can take the CME and lower valence off and put a new catback on. You'll have different tips and a different sound that way. Or you could just buy a different catback and take it to a shop where they can put it in, but mate it up to your current CME tips. That's a popular option too.
As far as other brands go, there are all of these different catbacks:
B&B
Bassani
Borla
Borlamouth (mix of Loudmouth with a Borla XR-1 muffler)
Corsa
Dynomax
Dynomouth (mix of a Loudmouth with a Dynomax resonator)
Edelbrock
Flowmaster
GHL Motorsports
GMMG
Hooker
MAC
Magnaflow
Mufflex
Random Tech
SLP 2OTL, Dual-Dual, Loudmouth, and Powerflow
Spintech
TSP Rumbler
Look through LS1sounds.com to find a sound you like of those. I currently have Magnaflow, but will be switching to SLP's 2OTL for a smoother sound. If I were you and you wanted a different sound, I'd just buy a new catback or muffler and have a shop attach it to your current CME.

