Get one. I have one exactly as you specify: ’03, V8, 5-speed. No major issues on mine for sure, and I haven’t heard of anyone having any issues either. The 4.7 V8 is, as I’m sure you know, kick a$$. The 5-speed is a perfect match-up. The 5-speed has a computer controlled brain that enables it to do things that I’ve never seen an automatic do. It senses when you want engine braking (I think it has a mercury switch or something to detect that you are going downhill) and downshifts for you.
This will give you an impression of how trouble free this car is. Here is my biggest complaint. It’s pretty minor: The climate control will go into recirculate on its own if it decides you want maximum cooling. It checks the inside temp of the car, and compares it with the requested temp on the temp control knob. If the difference is greater than a preset amount, it thinks you want maximum cooling and goes into recirculate mode, regardless of whether or not you’ve put it in auto mode or have the A/C on.
I also have some sunroof rattles. There is a TSB/Warranty fix for it, but I haven’t gotten around to taking it back to the stealer.
I’d get the V8 over the 6. There were a couple of issues with the 6 when it first came out. I would guess that most of them have been fixed under warranty by now.
If you have any more questions, let me know.
Here are a couple of forums for these:
http://www.yotatech.com/forumdisplay.php?s=&forumid=2
http://www.toyota-4runner.org/index.php?s=cc0ea6e59b80bc878a87aea110e69d60