I think it kind of depends. Some of the crazy expensive mechs look lovely but often a good clone of something can get the job done as well as (if not more sometimes) than a supremely expensive mod, or so I have heard (and have experienced, the good and the bad) with clones of tanks for example.
I'd say if you start looking into more expensive mech mods to look at reviews carefully, as that becomes a more major purchase but as far as I understand it, a mech doesn't HAVE to be expensive (and may often be LESS expensive than some regulated mods that have DNA chips and other things) to get the job done and done well. So if you decide to climb the price ladder, I'd say pay a lot of attention and do a lot of research, just like any other piece of expensive vaping equipment. It may be superb, or it may simply be overhyped.
I'm glad you are enjoying what you have now, though.
Anna