I can definitely recommend the Unicomp. I got a Dell as my first mechanical, as it was so cheap, then ordered a Unicomp not long after. Worth every penny, in terms of typing comfort.
But it really is only worth it if you do a lot of typing. I code a lot, so it works well for my purposes, but if you aren't a frequent typist, it really might not be worth it. You could also try to find an inexpensive used Model M. They are usually about half the price of a Unicomp, shipped.