I rode through North Alabama winter last year/this year. At the time all I had was a mesh jacket with two liners (wind/waterproof, thermal), Joe Rocket Alter Ego overpants, TCX X-Move waterproof boots (not, in fact, waterproof), and some A*stars winter gloves. I have heated grips on my bike and if it was below 45 and I was riding longer than 30 minutes, my hands still got cold. Legs hardly every got cold, but my arms still did.
Trying to run mesh gear with liners is not ideal. Running them with heated gear is much better, but you still basically have "air conditioning" that you can never turn completely off.
This year, I will have a Firstgear Kilimanjaro jacket, which, in the few chances I had to wear it when it was below 50, seems to work much better. For rides longer than 30 minutes to an hour in temps below 45, I'm going to be running heated gear this year. Especially gloves. My hands are always cold, so I'm the perfect candidate for some heated gloves.
I'd say get some non-mesh overpants and a non-mesh jacket (the Kilimanjaro is really nice, has D30 armor, but the Jaunt T2 is also a good winter jacket, as well as Tourmaster's Transition 3).
Livin' the dream