I'm convinced that I don't fall into the special class of circumstances warranting the $300 upgrade, and the 2.8 will be just fine.
I'll only be using two inputs for the guitar and vocals, on typical day to day stuff. For any of the RTAS Plug-ins and/or virtual instruments, at most, I will have about 8 different tracks, all with some different combination of reverb, EQ, and compression, but it shouldn't be anything major.
Oh yeah; with 8 tracks you should be totally fine. I used to work for a university that ran PT 7.4 on a 1 GHz G4 tower, and even that system could easily handle 8 tracks with a couple of plugins as inserts. It didn't start to choke until it got up to 16 tracks, each with two or three inserts, and of course a modern MBP is exponentially more powerful than that thing. You would probably reach the Pro Tools LE track limit (32) before you reached the limits of your hardware.
Somewhat of a general question, in the case here, am I safe in assuming that any hang-up will stem from running the Plug-ins in real time monitoring, and not applying them before I do the mixing?
You nailed it with this. The advantage of doing things as real-time inserts is that you have more flexibility when tweaking parameters, but as you point out, this takes more processing "oomph" during playback (and bouncing). But again, with projects of the scale you're discussing, you should be fine to do most (or all) of this stuff with real-time inserts. And if you
do ever end up with a project that your system can't handle in real time...
Or is there no other way to do this besides applying the Plug-ins beforehand, and I'm just going to be waiting longer (circa de 10%) for everything to get in its final form on the slower processor?
...you also have the choice of processing the effects ahead of time, in which case you're correct that a faster processor would just shave a slight amount of time off of the procedure. Pro Tools plugins have the same interface whether you're using them as inserts or using them process audio ahead of time, so it's easy to adapt. But unless you're processing looooooong tracks, the difference in speed (between the 2.8 and 3.06 GHz chips) would be negligible.
Lastly, in regards to the "eminent" (sic - cause the new systems are going to rock) updates, I am worried sick that a new OS is gonna come in and Pro-tools won't be supported for a couple weeks. In terms of the hardware, I'm worried the express card slot won't be there on a model in my price range (assuming of course that this is the way to do this right and run the input off a separate bus).
And I'm getting a little antsy, of course
Much thanks again.
You don't have to worry about a major new version, since Apple hasn't even announced 10.7 yet. There's a
chance that 10.6.3 would be out by the time we get new MBPs, but most of the time these minor version changes don't break Pro Tools, even if Digi doesn't officially certify the new OS right away. The main potential hangup would be if the new architecture (i5 or i7 or whatever) isn't supported; I think the unibody MBPs were officially unsupported for a while after they came out, although I don't know how this worked out in practice. Even if you want the current-gen hardware, though, you'll probably be able to get a nice discount on it after the new systems come out.
And the express card slot (which is only available on the 17" for now, and doesn't seem to be on its way back to the 15" models) is actually totally irrelevant; the Mbox 2 Pro connects via FireWire, which is more than adequate for anything you can do with the device. Even the larger 003 consolewhich can handle eight simultaneous inputsdoes just fine with a FireWire connection (which is good, since that's the only way to hook it up). You will probably need a FireWire 800 to 400 cable, though, since I think the Mbox only comes with a 400 to 400 cable, and I don't anticipate Apple putting a FireWire 400 port back onto the new models
