I have Trilian but have to admit that there have been a few times that I've struggled to get the sound I wanted, tried dropping a Scarbee bass into the mix instead, and have found that it just fitted a lot better. I don't know, I sometimes think the Trilian basses have way too much low end and I frequently have to make massive cuts, whereas the Scarbee basses require less work. Having said that I still love Trilian.

I have the MM and the Jay bass, but would LOVE to get ahold of the Rickenbacker and Pre-bass (can't wait for the sale to come back around). 
 
As for use, my Jay bass goes on just about everything!  Very few times have I found that I couldn't work it through a line easily.
The MM bass seems to take more work for the kind of music I compose (mainly Smooth Jazz, R&B and some Urban stuff).  Will continue to work with it though as I find it quite interesting. 
Sure, I have other basses.  I have a few that are quite good, but don't really have the "playability" of the Scarbee basses. 
 
 

Scarbee bass through Overloud Mark Studio 2 is pure heaven!

So I just checked out a fairly detailed tutorial/review of the Rickenbacker bass on YouTube...oh man, that thing looks pretty killer.  Kind of bummer that it only uses samples played with a pick - would be nice to have picked and fingered options - but it looks incredibly versatile and I imagine I can probably get just about any sound I want out of it.  (And to be honest, who knows if I'd even be able to tell the difference between fingered/picked in a mix.  I'm only interested in the fingered option simply because most bass players I see don't use a pick.  But what do I know?!)
 
I do like the option of using the amp/cab modeling within Scarbee or just using the DI samples and running them through another amp sim.  And the articulations really drive the authenticity.  There's no substitute for a real bass player of course, but for a bum like me, I know this virtual instrument would sound a heckuva lot better than anything I could plunk out on my bass. :)
 
So yeah, I guess I'm now leaning towards the Rickenbacker instead of the Pre Bass.  Totally blown away by that video.

If you want a fingered Rick sample library look at Orange Tree Samples Evolution Rick I have both the Scarbee and the OTS and they compliment each other nicely.
 
The OTS Rick does require the full version of Kontakt where Scarbee can use the free Kontakt player. This could change soon as OTS are moving towards regestered libraries that can be used in Player. 
 

The Ric bass is the real deal. I play it with my Fishman TriplePlay midi guitar and it sounds great. All the Scarbee basses sound good with the Tripleplay.

They should all be half price starting sometime next week.

I am a piano player who doesn't play anything else. Really like all of the scarbee bass that came with K10U. Thank God I don't have to take bass lesson to sound like a decent bass player. Can't recommend them enough.

I will add that the Scarbee Bass samples are among the best I've heard. I use the Scarbee MM Bass mostly.
They simply sit in a mix the way a real bass guitar should. The version I have came with NI Komplete 9 . . . and it was the first time I ever had a Bass sound so great in a mix, without a lot of monkeying / EQing.
I have a lot of issues NI and their samples, but the Scarbee MM series is one where I really think they got it right.