I RGH'd my xbox 360 E myself, which is better if you have the experience for. There is a lot of cool homebrew on the xbox 360 due to its power. The thing about modding on a RGH xbox 360 is choice of RGH/JTAG and stealth server.
Here is the types of RGH/JTAG consoles that are worth it.
- Slim RGH
- JTAG/RGH Jasper, NEVER A FALCON.
- Xbox 360 E RGH (mine)
Then for a stealth server you would want to get Teapot Live, you will always need a stealth server to avoid a lower console ban.
Teapot Live is paid and is costly, but It comes with its own engine for almost all CODS on xbox 360.
If you get a console ban you would need to buy a KV (Key Vault) which is like a console id. These cost a lot more than console id's but depending on your stealth server and how good it is, your KV can last longer.