Yo Stocktony! First, you will get all kinds of opinions, but the C1000S is one of the last mics I would pick for anything. The B-1 is, in my opinion, a mic that is very similar to the 3035, in other words, a workhorse mic that is very versatile. I like the C-4's a lot for small diaphragm condensers, I just don't use SD's much on acoustic guitar, which definitely puts me in the minority. Generally, I like transparent mics on killer guitars, and colored mics on cheap guitars. On a cheap acoustic, I like the Oktavas or AKG C2000B. On expensive guitars I like the C-4's (or better- KM184, Josphson C-42, Schoeps, Earthworks, etc.). If the guitar is thin sounding, a colored mic can add something that is lacking. On a wicked guitar, it can muddy up something that is already there. I'm very serious that you should audition an AKG C2000B.
It's $180 with the shock mount, and would be useful on acoustic and voice. I'm pretty familiar with the sound of your voice and your guitar. The C-4's are great mics for the price, and so are the MXL603's., and either one will add a new weapon to the arsenal. The C1000S is outclassed by a bunch of mics half its price, including those 603's.-Richie