My main set of IEMs are moulded UE Lives which I keep for larger gigs. They are good but I'm not a huge fan of them actually. I moved from JH Audio Roxannes to UE a year or so ago, mainly due to poor aftersales service from JH (but that's another story!)
For pub/club work I am happy with the KZs. There is of course a difference between them and the moulds (with seal and fit), but IMO the KZs punch well above their weight in terms of tone per £. The AS16 Pro X come with foam tips but I also have a supply of Comply which I change every 10 or so gigs. The ZAR is the most similar to the UE phones design-wise, as they have a dynamic driver as well as the usual bass/mid/treble armatures. The dynamic driver has a fairly significant impact on what the bass guitar sounds like, and not always in a positive way. I have learned that I prefer the sound of a more traditionally designed IEM without a dynamic driver. The AS16 Pro X fit this bill. A great sounding earphone for around the £50 mark on eBay. The first thing I did was upgrade the cable to one of those 8 core replacements, which cost around £20 in itself but certainly worth it.