Audio & video software: Looking for good replacement for MusicMatch Jukebox 10

Looking for good replacement for MusicMatch Jukebox 10

I am a long-time MusicMatch Jukebox user who was dismayed to learn of MMJB's absorption into the terrible Yahoo Music Player last year. I've still been using MMJB as my primary player on my XP desktop computer, but it's not compatible with my new Vista laptop, so I'm starting to branch out and look for alternatives. For now I've succumbed to using iTunes which is so terrible it makes my head want to explode every time I use it. It's true that MMJB had it's problems (being a tremendous memory hog and very slow in responsiveness with large libraries are two of my major complaints, in addition to random software bugs), but some of its features were more than just convenient - they shaped how I listen to and organize my music, and I cannot imagine living without them. Anyone know of a solid player that incorporates most of the following MMJB features in one nice package? (Sorted from most important to least important):

1. Separate playlist window from library window.
I routinely add random tracks into an ad hoc playlist by double-clicking songs in my library and in Windows Explorer. I do not want to have to drag tracks into a specific playlist that I must save and name, and I do not want whatever is playing to stop when I double-click a file. I need to see both the library and the playlist at the same time.

2. The ability to “audition” a song without adding it to a playlist or playing the next song in the library when it finishes.
MusicMatch calls this the “preview” feature.

3. Robust tagging tools.
I need to be able to apply certain fields to multiple tracks at once – artist and album info, album art, etc. I also love MMJB’s “Super Tagging” features, as I am anal about making sure my MP3’s are named and tagged as accurately as possible and according to my organizational system. “Lookup tags” from the MMJB online database was worth the cost of MMJB Plus by itself, in my opinion.

4. Customizable tag fields.
I like having “Featured Artist” as a field, as well as “Sub-genre” to help me organize my music.

5. A built-in batch converter.
Sometimes I have a WAV file or WMA that I would rather have as an MP3 and vice versa. I want to be able to choose the bitrate and convert the file easily.

6. The ability to “watch folders” to add files to the library automatically.
I move files around all the time, and not having to remember which files I recently added to my music folder in order to add them manually is a big plus.

7. A vertically-thin MiniPlayer that can be set to “Always on Top”.
I like to always have my music player on top of other windows without taking up too much space. I’ve used MMJB’s “Pegasus X” skin for years, for this very reason.

8. Customizable library views.
Usually I want all my tracks listed out flat, but sometimes I want them grouped by album art, date added, or genre.

Apparently this is a lot to ask, as I have yet to find a player with even a fraction of these features. Smoke starts billowing out of my ears every time I mention this to someone and they reply, “Why don’t you just use iTunes like everyone else?” Grrrrr… Any other audiophiles have suggestions? Sorry for the rant.