I don't know what's best,...
but I just know what I like and what I use.
I use DAW software sparingly, but for less than $100, I like MAGIX Music Studio v6. The standard version should be less than $40, which is 24-tracks, and the deluxe version should be less than $80, and is 48 tracks. It has features & functions similar to the other DAW titles in it's price range, including handling audio, midi, sequencing, and being able to port directly into MAGIX Music Video Maker software, [purchased separately].
Like I said, I only know what I use, and that's not great for comparitive purposes, but for my money, it's MAGIX. I'm pretty well set in the <$100 category, and my recommendation is "Music Studio 6", which is found at Best Buy, Fry's and similar stores.
BTW, MAGIX has a v-high end DAW title called "Samplitude", which I believe runs 24 bit, and is well above $100, but is based on the same format, or operating environment, that you'll find in the "MAGIX Music Studio" titles.