dei product all the way. I just threw away a spread spectrum compustar off my civic (beater), and installed a 791xv. Better in everyway so far. I had to replace the antenna 5 times on the compustar.
i like them both. the python 881xp is a good unit along with the 2WSS-AS. it just depends on your personal preference. compustar and dei are both good companies to deal with. Compustar is a little better on the customer service and repair side that i've noticed so that's what i base some of my opinions on. (being a warranty guy and everything )