What's your media ? if it's PC based (Like Cakey, CoolPro, SF,etc...)
start by visualizing (audiolizing?) in your mind the vocal sound you are trying to get. I have no idea what that is, or what type of music performance you are trying to capture.
but shooting in the dark, I would start with maybe some compression . some dynamics or compression processing will help smooth out the vocal to a more even professional sound.
consider doubling-up your tracks, and panning to the outside of your L,R channels. it's best if you record 2 passes, but if you're lazy copy one and offset it a bit to get a doubling effect.
I have yet to find a good sounding software reverb plugin that isn't hideously expensive, or has some obtuse engineer interface. But if you work the Cakewalk FX reverb plugins (v2 is better) you might be able to get something acceptable, if it's a subtle effect.
But if you want that professional rich deep reverb effect like Tony Bennett I'm not sure you'll find it at this pricepoint. Maybe consider an outboard rack unit ala Lexicon.
Hope it help. Put more info about your gear & recent technic...
Jaymz.