@Montunoman... What I will often do is use the sequencer in my arranger to record an SMF of the style that works best for the song. Try to get as close to the structure and flow as possible, but don't let details plague you... we'll fix that later. Save the sequence as an SMF, and THEN transfer to a computer sequencer like Cubase, Logic, etc..
Once it is in the DAW, a whole world of possibilities open up for you. For starters, you can now edit the sequence and make adjustments to things like the bassline (which arrangers' basslines pretty much suck... they never know where they are going TO, only where they are coming from) and put in a better leading bassline. You can now edit the drums, and take out the repetitive fills, and make each one at least a LITTLE bit unique. Here's where you can add in ghosting and other little drummer-like details, also.
Once the sequence is arranged and polished up to where it rocks, now is the time to think carefully about the SOUND. Even simple techniques like recording the drum sounds individually can go a long way to being able to mix them well (you simply solo each drum sound, dry, and make a recording pass), and software reverbs, especially convolution reverbs set to drum room impulses, can make a world of difference to making even modest drum sounds more convincing.
But if, in the end, the drum sounds themselves remain undynamic and unconvincing, you can use VSTi's like EZDrummer or BFD, etc. to replace some or all of the drum sounds. Care needs to be taken to match the dynamics, because all of the VSTi drum sets have FAR more samples per note than arrangers' do, but if the part has some dynamics in the first place, the VSTi will make the most of it. Most also have a 'round robin' allocation scheme, so that if you DO have multiple hits all at the same velocity, these things will alternate two or three different samples, to remove the 'machine gun' sound that can happen.
Once you start to replace your arranger's sounds with VSTi's, the sky's the limit. There are VSTi's that do real guitar strumming and picking, just like the Audya, outstanding bass sounds (I LOVE Spectrasonic's new Trillian), great percussion, strings, horns, you name it.
But the bottom line is to be VERY careful about deciding whether something that fails to convince you now is the fault of the sound, or of the sequence. You can spend a lot of money on VSTi's, only to find out that, even through the best sounds available, they still don't QUITE make you go 'that's real!'...
_________________________
An arranger is just a tool. What matters is what you build with it..!