Sure there are better mods available. What is your price point? What would be considered "better" to your? Just understand, the mod is just a battery holder with certain features. The real difference maker in flavor and vapor production will be from the juice attachment on top of that battery device.
You've already limited your possibilities to improve your vape by settling on clearomizers only. Easy and convenient doesn't often work out to be the best in flavor or vapor. The juice delivery attachment is the most important thing to improve for a better vaping experience.
Cartotanks are a step up from clearomizers. RBA's are a step up from cartotanks. I had a similiar experience as you using the AGA-T2 as my first rebuildable. They got put away and I returned to using cartotanks. However, I was able to get a Kayfun Lite Plus RBA and I've found my best delivery device yet.
So research into the Kayfun-style tanks (Kayfun Lite Plus, Russian 91%, Taifun, Fogger4). These are like cartotanks on steroids.
What Baditude said plus here's my
KFL+/R91% if you'd like to rebuild
Cartotanks if you don't
I used Evods/Protanks for about a year and they were easy, cheap to maintain and adequate.
Then I got an R91 and a couple of KFL+s They were a HUGE upgrade and easier to learn than I expected.
Last month I got a cartotank bundled into a classifieds buy so I bought a couple of cartos to try it out and like them almost as much as my RBAs.
Now I use my 5 cartotanks more than my 3 RBAs but I use both types everyday.
I tried dripping atomizers and see the attraction but it was too much bother for me.
I enjoy the cartotanks' ease of use and way better flavor than the clearos.
I got 3 Provaris from the classifieds and mostly use them but still use my 3 Vamos and my MVP2 also.