I come from years of using Peak and Peak Pro (until the bitter end). I happened to see a message in the Console that an upcoming update would break Peak Pro, so I figured it was time to bail. I had dabbled with Pro Tools LE via an MBox 2 Micro. Pro Tools was overkill for what I was doing. I find Logic Pro to be similar in many ways to PTLE, but a tad bit more user friendly.
I do miss Gain Envelopes from Peak Pro, but so far that is the only downside that I've found.
I suspect I'll be lurking here for quite a while getting up to speed and reading through the forum.
Cheers!