The 2JZ is a spectacular motor, I would certainly keep the Lexus as a DD. I currently have an older DD ('88 MR2 Supercharged), even with heat/ac, leather, a decent iPod stereo and a quiet exhaust it's still not the same as my '05 Altima SER was. So much more car around you, a lot quieter, and my Altima was just amazing to cruise around in on the highway. Your Lexus has all the amenities of my Altima and then some... and then 400+ hp more haha.
Lexus>>>510 for a DD