I'm wondering if there's a standalone Bass Amp modeler that might be better than the bass amps included in programs such as TS4, Guitar Rig 5, etc?

a real bass amp, is another step up!
 

PilotGav
I'm wondering if there's a standalone Bass Amp modeler that might be better than the bass amps included in programs such as TS4, Guitar Rig 5, etc?

TS4??
With my virtual basses I use Amplitube mostly, favourites are the Fender Bassman 300 and the Orange AD 200 both of which I use a lot more than the ones in the older Ampeg SVX collection. Of course things may be different with a real bass.
 
You may want to investigate Mark Studio 2 from Overloud. No idea what its like but it looks intresting http://www.overloud.com/news/ms2-release.php
 
 
 

And Ampeg SVX...

Lol I meant Amplitube 4

There is also GK Amplification which is a bass amp sim modeled on Gallien-Krueger bass amps: http://shop.audified.com/products/gk-amplification-2?variant=1032178249  There are several different versions including a free version but the free version has limited features.  If you like GK bass amps, download the demo and see if it is what what you want.
 

I have Amplitube 4, Mark Studio 2, and GK Amplification 2. I highly recommend any of the three but Mark Studio 2 and GK Pro are my gotos for bass. GK Pro 2 usually ends up the most used.

Overloud Mark Studio is my go-to bass amp.. There are multiple amp and cabinet models as well as built in FX.. Highly recommended!

Dup - Forum software - please delete

Audified also has the Gallian-Krueger bass amp...

http://shop.audified.com/collections/for-studios/products/gk-amplification-2

Non pro is slightly cheaper...

EDIT: Sidroe mentioned it above...but I have the link...