My fiancée and I did this ourselves. She did the logo & header, we did the colour scheme together. Colours etc were all changed using Style Properties in the ACP.
We bought UI.X because it works well as a mobile theme with the chunkier buttons and off-canvas menu, which you can see if you view the site on a mobile phone.
It maybe worth it. I am not really interested in putting a lot into the forum as they are difficult to
get going, and I would use the forum as a secondary place to post content that is too small for the site.
at the very least, I may consider doing two things.
1: upgrading to the latest xf version.
2: Install a better theme...
and that is about as far as I am willing to go...
unless some wildfire of users start signing up...
but like i said, forums are very difficult to startup...
My original idea was too disable signups, and use the
forum to post legal type notices and thats it...
However, I am on the fence...there are just too many
niche forums that already have 100k to over mil posts...