I have the Fender and the Ampeg Plugins. The Fender one has very limited Bass tones but i found more use for it than i did the Ampeg. I want my money back on that one. The Ampeg one truly is an amazing example of what you pray doesnt happen to your tone...I say this because i expect folks to recommend it to you in this thread.
The line 6 i have only heard through a friends setup. Didnt do much for me.
Maybe you wont like this next part...8)
I honestly believe you are going to find the best results if you focus on having a Quality Tube or SS preamp/ DI into --> Good Audio Interface.
I go from there into Logic 8 with Tritone Digital Colortone plugin, and Sonalksis compressor. Thats it.
The Colortone plugin does way more for my bass tone than anything else i have seen yet. I have demoed a ton of plugins too. Its like that subtle finishing touch every track needs 8)
Thats the best advice i can offer for home recording at this moment in time
Try demos first!
http://www.tritonedigital.com/produc...products_id=32
Also check out the Valvetone plug they make. its very sweet as well.