I last spoke with Bob about 2 weeks ago and he didn't mention a vacation anytime soon, maybe an emergency?
When you do get to speak with him he'll know what's best - he suggested the larger panel for 1 of my elcosures (the bottom) because I keep my house on the cooler side(my A/C around 65 during the summer and the heat usually off in winter, set at 55). I have 3 T10's stacked with Pro Products RHP's in them controlled by Herpstat and haven't had any problems keeping stable temps. Good luck.