Question about trailer for Fountain
 

I've basically had enough of my current 89 steel loadmaster trailer. Its almost more of a money pit then the boat. The question is, while shopping around, what size do I look for? The boat model is a 27 Sport (fever), loa 29' swim to beak. I see a lot of trailer companies that offer 26-28 or 28-30 etc. Also, do I do tandem (currently have 8 lug) or trips? Thanks