I just wanted to add that I have the 1180CD, and I'm in flippin' wonderland with it. I would admit freely that there's a certain amount of boning around to figure out what the hell is going on at some points, but the product is good.
Whatever you get, I think you will really enjoy the freedom of digital.
As for your 'sucking' on the bass, bear in mind that many great tracks have less than... heroic performances on some instruments. So why do these things sell? Ultimately, in my humble, playing from the heart and trying to play WITH the other instruments will work. For bass rhythm ideas, listen to the bass drum in the beat you are going to use, if you are going that way, and try to come up with some thing that will not fight with that bass drum.
Another idea might be to actively listen to the bass on music you already have that inspires you. What the hell are they doin' down there? Sharpen your ears and see how the bass works hand in glove mit der drums.
I hope this is not too far off base!