There's a lot of good advice here, and I'm adding my 2 cents...
I have both a Tourmaster Air 3 jacket and pants, and an Aerostich Roadcrafter R3 suit.
I have used the Tourmaster gear on a cross country trip from CA to Chattanooga and points beyond, as well as separate jaunts to Colorado and Oregon, encountering extreme heat and Storm of the Century rain along the way. Although I carried both sets of liners, I have never broken them out, as it is too annoying to stop, drag them out and put them on. For extreme heat, I first used a cooling vest. At the end of the day, the suit and cooling vest stunk to high heaven, and on longer trips, I ended up washing the suit and vest a couple of times if stopping for a couple of days.
I subsequently acquired a Veskimo cooling vest that worked well in heat, without the stink. After this learning curve, I wanted something that could be worn in all temps, breathed well, would allow the Veskimo's ice to last longer, and alleviate the need to lug around liners or extra rain gear.
In Nov. '14, I bought the 'Stich and have worn it to CCR last year, continuing on across BC and Alberta, dropping back down into Montana. It rained pretty constantly throughout the trip, and I even encountered snow as the temp dropped to 32 in Montana. During this ride, I wore jeans and a sweatshirt underneath and stayed comfortable and dry all day.
The 'Stich is good for temps up to 85-90, but beyond that, I use the Veskimo outfit if riding any longer distances. The nice thing about the suit is that it is one piece and you can wear anything underneath (I've worn shorts and t-shirt and slipped on Teva's after arriving at my destination). Putting on or taking it off takes about 45 seconds and you're good to go.
I have not worn the Tourmaster since getting the 'Stich and it hangs forgotten in my closet.
Good luck on making your decision!