Im planning on upgrading my panasonic L300U TO a SONY Z5 OR MARANTZ VP4001 aka SHARP ZXV3000.
which one is the better Option, Thanks for everyones help in advance.
I will be using a Dalite 106" screen from about 11.5 feet away.

I love my SANYO Z5 (you called it a Sony), but have no knowledge of the Marantz/Sharp model you noted.

Another projector to consider may be the well rated/reviewed Epson 400, which has a generous rebate right now. The Z5 is ~$1100 after rebates ($200 & $100) and the Epson can be had for about $900 after $500 rebate.

Check out reviews of both at Projector Reviews and Projector Central.

You'll probably be very happy with either choice.

I would also look at the benq W500 and the samsung 710 deal at tiger direct. Read the thread on this board.

I have the Sharp dt-500 very similar to the 3000,I love it ,beautiful pic on 106" dw wilsonart screen.Some complain of noise with these units but I rarely hear mine,only at startup and cool down mode. :D

I have the 106" HP and a xv-z3k.
I think you'll see SDE with the Sanyo. I sit at 11 feet and have very good eyesight and can see the beginnings of SDE with the z3k, which has a better fill factor.

Very satisfied with the z3k.

Blindingly bright if you shelf-mount the pj

The MARANTZ VP4001 and SHARP XV-Z3000 are similar and therefore both excellent units. Many have the XV-Z3000 since the Marantz was priced very high, however that no longer seems to be the case since I got mine for less than the Z3000.