the non-custom jh13s and jh16s are only an approximation of what they actually sound like. And I can't imagine pairing jh13s with a tube amp.
When you say "given the choice", are you saying you're not getting any of them? Because you ARE given the choice if you're ordering. That's what the ordering process is.
I just swapped a 9 speed cassette onto a better 26" wheel I picked up, so I think the red white and blue fsr should be rideable. I'll test it tomorrow. I may also need to replace the fork, but I'll find that out soon enough.
you might find more help regarding the AudioGD "offerings" over at head-fi. There are a number of shills there who should be able to tell you whatever you want to hear.