I'm new to the forum so first & foremost a big Hello

I've been looking at the various packages I would like some pointers.
I'm running a P4 3GHz 800 frontside bus with Logic 5.5 as my main sequencer. I use an RME Hammerfall soundcard & also a Powercore MKII as well.
Ideally I'd be buying the DSP card for the use of the Minimax & then buying either the Pro Tone or Prophet 5.
I don't need the outputs as I'd be running it all digitally.
Are there things I should know beforehand problems or compatability issues that I should be aware of?
How many voices would I expect to be able to use with the synths I mentioned?
Is it worth buying both the Sequential emulations or just go with the Prophet 5 & then switch it onto mono mode or is there more to it than that?
Any help would be greatfully appreciated as I really want to get one of the Scope range, but their website is a minefield with little explanation.
All the best
Jay