Hi Artie,
...and I would appreciate a bit of guidance regarding MegaPak vs. UltraPlusPak, not that I can afford either one. I'm not a professional musician. I'm not highly trained. I'm just a dope who sings badly in a community choir. Every once in awhile, I want to sing Danny Boy or Blue Bayou or Boogie on Reggae Woman with a suitable accompaniment. I thought I would be able to do that with BIAB Pro.
This you can do. The question is: What do you think a suitable accompaniment is? Guidance depends a lot on your framework of expectations.
I have quite a few friends who are professional musicians. Those who have Band in a Box have the PRO package. They use that for practice purposes when the band is not available. They often use it only for segments of songs to get them right. Before using BIAB they recorded their own backing track playing two or three instruments. BIAB frees them the time for more effective practising.
The original intention was, as I understand it, to create backing tracks to practise. That is what professional musicians mostly do with it. The PRO Pak has the correct name.
When I bought BIAB I wanted it to create backing tracks that I can use on stage. So I read the PGMusic web site very carefully more than twice. I also read some forum entries. As you wrote, it is a lot of money. After I thought I understand then I got the EverythingPAK -- in December, because the forum members were talking about the annual discount prices in that time of the year.
Buying one of the larger PAKs will not get you more functionality. The software is exactly the same. It will get you more choices of sounds, in this case RealTracks. Read the forum about RealTracks before you make a decision on what you think you want to buy. There are so many posts from new users asking questions as you are one yourself. The answers should give you enough insight. Then ask
your questions. They will be answered.
Guido