Here's something to help with metering. It's perfect for metering loudness rather than peaks/clipping, it comes from a very reputable company, and best of all it's free...
http://www.pspaudioware.com/plugins/tools_and_meters/psp_vintagemeter
Didn't get to hear the first mix, I like the track and I can offer my thoughts.

I'll start with a question, did you use a compressor across the whole mix ?. The reason I ask is because it seems to me that the kick is causing a bit of an issue. Around the 40s+ mark, when the kick is hitting it's a big transient (i.e. it's a loud sorta 'snap'). Sounds like a compressor is getting hit by that snap and reducing the gain, but it sounds to me like it's reducing the gain on the other tracks too. This makes it sound like the whole track almost throbs around the kick and it's knocking the balance off in my ears. It's noticable most at 1:38, the kick overpowers all.
The other thing I'd look to tweak is the eq and room a bit more. The bass sound is huge (love it btw) and when the drums get going there is a lot of sound there. Particularly the sounds of the drums that sound very live, i.e. you can hear a lot of the room. Around the 1:08 mark the lower toms are sounding a little flabby and they're getting a bit lost under the boomy balls of the bass. It might be worth 'focusing' the eq of the bass a bit higher up the frequency spectrum to give a bit more space in the bottom end. Or you could look at perhaps getting some 'tighter' sounding drum samples. The fact that those drums are sequenced is pretty cool to me, I can manage a Boom-bah boom-bah when I play them in and thats about it.
As for what compressors etc, multi band compression may be your friend here, but it's also something that can be fantastically complicated. Multi-band compressors allow you to apply different compression settings based on the frequency band. I.e. you can keep the compression on the bassier notes (which tend to have more power) tight without knocking out the higher frequencies. I'm not a pro-mixer at all and I'll struggle just listening, it's easier to me when I've got the mix open and I can see whats going on.
Hopefully this sounds plausable and helps. I like the composition btw, and the photo of the rig looks cool. The fact that the headstock doesn't reach the top of the cab says it all ;-)