Need help picking between 6550 and KT88 tubes

I have an amp coming this weekend that uses EL34, 6L6, KT66, KT88, etc. I read up over at the Asylum and there are a few folks raving about the 6N3C-e (or 6p3s-e, depending on the alphabet (Russian).
The amp comes with 6L6s, so I ordered a pair of EL34s and a pair of 6N3C-e. Jim McShane has the 6N3C-e for about $30 delivered in the US, so not much of a risk at that price.
Something to think about.

Generally, KT88 have more body/meat in the sound, but also found them much musical. Personally I compared NOS 6550 TUNG SOLS Black smooth plated and NOS GEC KT88. I also tried NOS 6550 Sylvania's, but didnt liked them that much. After all, it would be your personal choice, but after GEC KT88 nothing been better for me. Dont forget about pre-section, which is also very important, which have a huge influence in the whole. My amp was PrimaLuna Prologue Two

Forgot to mention that NOS EL34 Tesla's are great valves as well, the only EL34 I ever tried, but they sounded very good, less extended and may I say bit laid back, compared to KT88, but not in the worse way, just different. I was very impressed with them.

do you buy your tubes PL(platinum tested)? I have been told that is the only way to buy. it is 3 burn inns and tested after each i believe. I have been emailing jag music for pricing. I would require 24 + 4 extra kt88-eh-pl produced in pertersburg russia. any thoughts? I have also concidered kt88-gl-pl, which are gold lion, as well. anyone else looking for the same?