It depends on how you define portable.
My portable rig is currently 2x Sound Devices MM-1's + 1x Korg MR-1000 + mics / stands / cables. I've got the field recorder and preamps rigged up in an over the shoulder configuration. And it's all battery powered so it is "portable" by definition. But each MM-1 weighs more than my Korg (including the 8x AA batteries), so weight is 3x's plus some, not including the mics. But it comes in handy to weight down the bottom of the mic stand so it doesn't tip in the wind. I'm still working on the configuration that would allow run and gun abilities. Also with video (Sanyo FH1). The FH1 plus monopod that is ace bandaged to a spider brace for the total video rig and that comes in at about the same weight as a single MM-1. Upgrades to come later as budgets allow. Probably better mics this year and something non-consumer camera wise next. Although I already bought the MM-1's this year so budgets are a bit tight.
I was going to go with a Fostex FR2le, but with only 4x AA's and media not included I opted for the Korg. I got the Korg used and at a price that paired well against the FR2le + card prices at the time. And with 8x AA's, a glimmer of hope for native onboard longevity on common batteries.
Rode NTG-2
http://www.rodemic.com/microphone.php?product=NTG-2Noise specs:
18dB A weighted
76dB Signal to Noise ratio
So not the mic. Max SPL 131dB so not too good for a rock concert. Not as quiet as other mics. But still good.
Zoom H4n
http://www.zoom.co.jp/archive/English_Manual/E_H4n.pdfIt looks like the H4n only allows for 32dB to 47dB of gain, which is kind of weak. And are known to be a little noisy. The MM-1's allow for 66dB of gain (if the knob / specs are to be trusted). And the Korg seems to spec near 60dB of gain. Looks like the Fostex seems to spec near 50dB of gain. By all acounts the Fostex's gain is cleaner than the Korg's. Not that it matters much with an external preamp.
My modest rig. Less mics and mic stuff. The little red pouch is where I keep the remote control for the FH1. And the lens cap when it's off. Not pictured is the day bag strap with clips that I attach when it comes time to carry / lug the unit in far off lands. I'll probably opt for a baby harness or something to carry it in view while recording once I figure out the run and gun configuration. I'm still shy a few gadgets like shock mounts, adjustable stereo bar, and mic clamp. Any sort of DIY effort there is going to be bulky at best.
I'm basically in the same boat as you, but maybe a step ahead too. Going for that cheap sound devices 702 rig as well. Not to imply cheap. My main bottleneck right now is that I don't have the right mic(s) to make full use of my current specs. And the camcorder is still more of an afterthought / necessary evil.