picking up new car tomorrow

i just finished uninstalling all my aftermarket products (hu, speakers, amp, subs) out of my honda and i will be picking up my 02 lexus is300 tomorrow.  i was wondering if anyone has worked on this car and what you thought (hard to work with? easy to work with?).  i like the way the factory head unit looks and i would be hard pressed to change it.  the factory system seems above average but can be improved. I am contemplating selling off all of my equipment and starting over. what does everyone recommend? 

What equipment do you have right now? If you're tired of what you have starting over is one of the best things about car audio (if you have the money to).

i have a pioneer deh-7500mp, alpine MRP-M350, 2 JL 6.5" co-ax, and 2 12" MTX thunder 6000's.  i am thinking about keeping the amp and running to one 10" or 12" sub (of good quality, JL or eclipse) but i have heard subs sound bad (solid construction-hard for soundwaves to get into the cabin) in the trunk of an is300.  any suggestions.  maybe i would be better off just selling everything listed and starting from scratch, the products have been in use for only a month. thanks guys