The cool thing about TTS is that it can handle 16 midi tracks all by it's lonesome.

As far as ease.... once you learn TTS, any synth is easy. Most of the better ones are one channel synths.... one instance=one track=one instrument/sound. add another instance and repeat to build the band. 

This is generally not a problem with today's very powerful computers and sound interfaces with ASIO... unless you are trying to build a 100 piece orchestral project. In that case I would defer to TTS for many of the section tracks and let the lead instruments have the individual synths. 

Another good FREE amp sim is called Acme Bar Gig http://acmebargig.com/   NOTE: the free sim is called SHRED and it's not there right now. There is a note that they are overhauling the site and the freebies will be back "shortly".... so just bookmark the site and check it every few days. One of the cakewalk forumites has a hand in developing this sim IIRC.