A couple comments re the cyogenmod 4.2.13
1) In the upgrade/release notes they state that the Enoch theme is compatible. It doesn't cause the phone to crash but for some reason it does force it to stay in 2G mode.
2) 4.2.13 seems to have messed with the APN settings which had a serious detriment to the speed (even in 3G), not a big deal just reset your APN to:
MMSC: http://mms.gprs.rogers.com (http://mms.gprs.rogers.com/)
MMS Proxy: 10.128.1.69
MMS Port: 80