For me, Tea is something that is different for everyone, some like PG, some like Tetley, but for me it has to be Yorkshire Tea, and i think the other two teas are awful, It comes down to personal preference.
For the place that you have but forward, it does look like a smart place to go and looks very much 19th century England feel or maybe a Downton Abbey feel, something you Americans sen to love. But to me it looks like it a place with a whole load a descriptive names for different tea' that probably taste somewhat the same and there will be a rather large price tag to go with. If you want something different i guess this would be something different
It will be your personal preference, if you just want the bog standard tea then go for the black teas and depends whether you want it flavoured , but it looks lie there are a variety of flavours which you won't get in England, apart from all the herbal teas, just go with what you think tastes nice.