Just a few questions regarding purchasing. :x

[Choy]

Okay, so I'm completely new to unicycling, and I'm looking into buying one. I live in Chicago, Illinois, and I'm not looking to spend a ton of money on my first unicycle (Under $150). I just have a few questions, and such.

• If my inseam is 27in, am I better off just getting a CX 20 Inch?

• Is Torker the most reliable brand? Are there better?

• I want to buy a wheel size that will do me well with distances, but would still be okay if I ever wanted to learn how to do tricks, what wheel size would you recommend?

• Is it really that much harder to learn how to ride a unicycle with a bigger wheel, as opposed to learning how to ride one with a small wheel?

I'll probably have more questions as I go along, but any help with the current ones would be much appreciated.
Any opinions, tips, etc would be great too. :]
Thanks!