I think your next move will probably be getting a better studio microphones. You need a good mixture of different brands and styles. I recommend getting at least one Neumann, although they are incredibly expensive, they are worth the money.

http://www.sweetwater.com/store/detail/KM185/
That’s a real versatile micophone right there. You can use it for many applications, thus making it worth it’s big price.

Also look at some AKG or Rhode mics. You can go on the lower end as well and get some Shures.

Since you’ve already invested in the FireStudio Interface, that kind of limits to what you can do without upgrading that piece. Studio Recordings use really good microphones and preamps, and that contributes to their quality sound. Also the soundproof rooms and environment have a factor in it as well. Also the amount of knowledge you have with the software plays a big role. Your recording software allows you to edit, mix and master which contributes a big part to getting that nice polished, mastered sound.
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