I'll throw Giant Leap's microseam phenolic into the mix. Same as PML's phenolic except the seam is considerably smaller--meaning it should be much easier to get a smooth finish. It's about the same price as PML's as well.
Phlexible phenolic seems to be a kinder, gentler phenolic Seams are huge but it definitely seems to be a good middle ground between paper & phenolic tubes. FWIW, when you cut it, you can clearly see how far the resin is impregnated into the paper from each side. Neat stuff.