Well, you are set up for preamp, anyway, which is a good start. But basically, until you try and work with a mic you won't know which one best fits your voice, tho any good mic should do a good job. And the style of music you do. The SM-7b is a good mic for rap (and radio) and kick and bass and some screamer rock voices. For singer songwriter ballads, probably not.
Otherwise I'd tell you to get the Microtech Geffel lollipop or their bottle mic, a real Neumann m 7 mic capsule on a recreation of classic Newman mics. Just like everyone from Frank to Mick used on their vocals (and everything else). They will set you back over $5000, but they are from G. Newman's original factory. So the first thing to do is figure out how much you can pay for your vocal mic, then work from there. The MG is one of the best "recreations" but you ain't likely to hear much of a difference between them and a knock off at $2000 or $800. There are lots of takes on the Neumann U 47, including Neumann itself, all across the price range. A large condenser tube mic is usually the best for vocals, although FETs will work great, too.
Your best bet is to find the music stores in Montreal with a large stock of mics. If you flash the cash, they should let you try them, extensively. Sometimes there are problems since no one wants to have another's spit on the mic and sometimes the State puts restrictions on testing or returning, but a dealer will work with you if you are spending $500 or more. Hell, my local GC let me test a bunch of Oktava 102s when they were blowing them out for $50 each. Start with the most expensive you can afford - but test at least one higher priced unit just to see. Dealers will always want you to buy whatever is overstocked and has the largest profit margin, but they will sell you anything. Make sure you have a selection of different priced mics - and check out some of the same type models that are FET rather than tube. They may let you take your favorite choices home to test in your recording space, which makes as much difference as mics. A bad sounding room will only be better captured by a great mic, which is another reason why and SM7 and other dynamics will sound better - they have better rejection.
If you go to such an investment you won't feel sorry later. You'll get a good-sounding mic for you. You still may want to upgrade later, but you won't feel cheated in the meanwhile. You got the best sounding mic to you at the time. I use an old modded Oktava 319 (about $500). It is still not as smooth as I would like but for most vocalists it works and I doubt if many casual listeners could tell the difference if I bought a Geffel.
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