cd
all comercial cd's are 16 bit 144 bit depth, they have to be burned at that rate, what you are lacking is the ability to master the song , adding compression , limitors and all the eq that you are lacking, when you get n track you will not beleive the difference in the sound quality, which will allow you to record in 24 bit if you get the upgrade, whick is great for definition and detail, but you will still be burning at 16 bit 144 depth rate......
i use the 16 bit version and it sounds great the difference is awsome, only trouble was i had mixed down alot of songs, and you really want to save each track in import into n track and manipulate each track from there( eq effects compression.... try audiominds.com
great n trackers there with all the answers to recording and quality issues