I agree you need the extra modules, but you wont loose the function if you go with a new remote. Infact you will increase your range over stock. You just need to program the auxilary functions for the system. (this is hard to say since every alarm company does this in a different manner) Also- anyone that owns a clifford alarm, will tell you it is far from a Viper, Python, hornet, etc. I agree some is marketing, but there are drastic differences in quality/features/price between the lines, but all are made by DEI check the website:
http://www.directed.com/