OK, so I'm torn right now between getting the Elipse AVN5435 Nav Unit or th RNS-E Nav Plus Unit. I have a 2001 A4 Quattro. I'm wondering if one is better than the other from a technical stand point...meaning, which one is easier to integrate, requires less additional components, etc. etc. I also have a 6-disk factory changer in the trunk which I'd like to be able to use...but it's not critical. So, I'm looking for opinions/input/advice. Some specific questions:

1) Can the Eclipse work with my cluster?
2) Which one is easier to integrate with Sirius?
3) Are there any power/output /amplification issues with either unit?

Sorry if these questions seem "dumb", but I don't know too much about car stereos and related subjects.

Thanks,
Mickey