First thing that scared me here is your original post seems to suggest you are double micing your vocals. Is this correct? That's a BIG no no in my books. Unless your head is FIXED in position, any movement will result in very audible phase movement. Just DON'T do it, in general. There are always exceptions ;)
As has already been mentioned - ROOM ROOM ROOM ROOM ROOM!!! This is EVERYTHING!!! Forget SONAR. It's next to useless unless your recording is right. I've just started to record the vocals for my album. I've got about 10 days to record 9 songs. And I'm moving interstate in 2 weeks. BUSY! This is what I made:
Unless you have a nice room, you want to remove it. Simple as that. In a home studio, we often want to go very dead because house rooms just don't typically sound nice. In a nice studio, that may not be the case, in the home studio, it usually is. Problem is, if you remove just the highs (which is very easy to do), the lows still resonate. In starts to sound boxy. Reverb doesn't really fix it. I've tried to get a balance in my vocal booth shown above. The inside is mostly absorption, but I have one of those panels now turned the other way to allow a little bit of high frequency reflection back. I also don't seal it off completely to let the room breath a little acoustically. The floor is also made of tiles which I leave open. This won't do much for removing the low frequency side of things (though being a big room helps spread it out) but adding a little high end back in attempts to keep things balanced well. It brings some brightness back into the recordings without sounding reverby or boxy.
I am using a combination of an SM58 and a Rode K2 on my album. I choose the mic that best suits the song/backing/harmony/section etc. I find they compliment my voice in different ways. You might find one mic is best for everything you do. That's easier! Though using a different mic for harmonies can be beneficial.
On mics, if you can't make the kind of set-up above, you're likely better off using a dynamic. By design, they tend to reject much more room sound that a condenser. As has been mentioned, some great results can be had from them. They don't have the same air to a condenser, but that didn't stop U2 being huge now did it? If it's some nice air top end vs loads of cheap plaster room sound in your recording, I know which I'd choose any day.
Until you get this stage first sorted, I wouldn't even bother looking at new mics, let alone processing techniques. Look for the bottle neck. 90% of the time, in a home studio, it's the room. Biggest bang for your buck. Sure, a better mic might help, but it also might make things worse by picking up more accurately the sound of your room!!! Fix the room, the rest can follow afterwards. Don't waste your time fixing the power steering in your car if all your wheels are flat!