There was so much messiness in this thread that I really don't know where to start, but I do want to say a few things... In no particular order here...
-Some of these standalones are definitely not simple or straightforward... My old boss one had a terrible workflow to it.... Cubase SX3 is so much easier and way more straight forward...
-Windows does not need to be more complex or clunky than a mac... I get rid of all extra features in windows... My start menu has Reason, SX3, Nero, Photoshop, Disc cleanup, my interface software, and NOTHING more... The icons on the desktop are the same... My folders and harddrives are so organized a stranger could find what they wanted... My Ubuntu software is more cumbersome than my XP or 7 is....
-Using sx3 is super simple...
-As mentioned above
the plugin options and overall flexibility are fantastic, but it goes farther than this... Using FL studio, cubase, reason, and other softwares Rewired together create an integrated system that would be hard to parallell in a hardware world... Each has a different workflow and method of creating... Would you like to create from loops, or from a piano roll, a sequencer, from midi, audio recording, etc, etc... And with a computer (mac or pc) you have more options in this reguard... Even today vinyl djs will use software integrations just for this purpose adding software like reason,
maschine, FL, and more... They may use hardware sequencers for some things, but there are so many options available.. SO definitely flexibility goes to the computer...
-You don't have to have a seperate recording computer, but it is a plus if you can do that... It will be more reliable long term... Again, mentioned above, the computer doesn't have to be hard to set up or have issues.. My main recording computer is from 2003 or so and has been amazingly reliable.... I set it up once and have never had an issue with anything... Do your research... Know what works and what doesn't... You don't have to be an expert... Once you find a setup that works, leave it that way... I'm still using the drivers from way back then.... I ran it with two gigs of ram untill two weeks ago... I admit that I don't usually have more than ten or so tracks in a project, however, it can be done!