Hi Lee,
like Bernie, I've had BIAB for approx 20 years or so , also.

Never really used it much except for the odd style which I'd convert across to one of my keyboards.

My last laptop struggled with the Real Tracks when they first came out, so I forgot about trying to use them.

Wasn't till last year when I upgraded to a decent laptop I decided to try the Real Tracks again. They're really quite good.

It's basically a trade off , if you want to use realtracks , can't have realtime arranger functions.

You mentioned Live Styler and the mega & Sd2 voices. I think you actually have to buy the harddisk version to run them.

Recently bought Live Styler just to try it, but I didn't buy the mega version copy.

I did buy the SD2 disk, though, ( it was only something like $40) I don't beleive it's useable on it's own within Livestyler, it's only an add on to the Mega hard disk version. It's really quite a good collection of soundfonts.
Unfortunately they're individual instruments not one big soundfont bank. It's well over 1 gigabyte ( that's probably why they're individual fonts) haa haa Biggest soundfont bank I've ever tried to load was about 250megabytes.
I actually found a good use for it. I've converted some of the Live Drum instruments to work in my Korg for my Ketron sd1 style conversions. Now I've got the correct drums playing.

If you do end up buying the Mega version , let me know what you think of it.

At least you've got something to go on with for time being till you get a new keyboard..

The software arrangers are a great fill in option.

Great to hear from you again.