Optima brand spiral cell AGM's are able to handle the higher voltages typically associated with 'wet cell' batteries. I use nothing but them for both house and starter but if you are looking to mix that's a good choice if you are worried about over voltage on the starter. IIRC it can handle up to 14.8v without burnoff/damage. I charge at 14.3v and have had no problems at all in three years of use.
Lessons learned are opportunities earned.