If you really want to, you can pull the mms.apk from a CM7 7.0.3 build. You can have all the settings of CM7's SMS.
The only downside is that I have experienced it'll soft force-close only on MMS if you try to share a picture by the gallery or whatever. You have to manually hit settings, attach the file in the text box to send a MMS.
other than that, SMS works great.
Before you try it, mms.apk 7.1.0 doesn't work.
Maguro SC-04D Mako E960
Build: 4.3 JLS36G Build: 4.4 KRT16M
Baseband:I9250UGLL1 Baseband: 2.0.1700.33
Recovery: CWM 18.104.22.168 Recovery: CWM 22.214.171.124
Build: 4.3 JSS15Q
Recovery: CWM 126.96.36.199