questions about tubes - to experts


I'm new in tubes (just recently bought first tube component ever), so I have some questions. I discovered Electro Harmonics company, how good are their tubes ?
Much worse them the best from what I had read here on Audiogon Western Electric, better them Sylvania, Swietlana... ?
For example is EH 300B worse them a few time more expensive Western Electric 300B ?
What is a difference between NIB pair of WE 350B and pair of WE 350B ? What NIB stands for ?
sorlowski
Try the Sophia mesh or the JJ mesh; same tubes. They are as good as the current production Western Electrics and are excellent values. Original Western Electrics are simply too much money for a NIB pair in sealed boxes if you can find them .

The Sophia Princess 300b is wonderful and does sound a bit better than standard 300b but at a cost. Different transformers and overall design are required AND they make around 5 watts with a conservative design where they are not overdriven. I am thinking of having an amp built around the Princess as the power is fine for me as I use 96db/8 ohm Galante speakers. Hard to tell if these tubes will be available in a few years as they are not advertised very well other than on the Sophia site.
You can do lots of searches hereabouts on '300B', Harmonix. or Western Electric.

Also a general google on 'tubes and 300B' will turn up quite the evening's enjoyed reading.
If you're looking for a high value 300B I would recommend trying out the Valve Art Titanium Meshplate tubes. I picked up a pair for $165 and at that price they're a steal. I really don't miss my Western Electrics at all. I've never tried EH so can't comment on them.
I presume you're talking about 300B tubes? If so, I know nothing about EHs as have always used Western Electric. But I'm considering getting some Sophias just for fun - maybe the new Princesses.
Sorry for the confusion, N.I.B. stands for {"New In Box"}

Is that better Gunbei??? ;0)~