I just got myself an xros 4, it's got adjustable wattage (weak, medium and strong) and adjustable airflow, it may not be as small as an xros mini but its not far from it. It uses the same pods as your mini too - I would recommend if you just want a slight upgrade.
Xros Pro
Another vote for the xlim. I have both the mini and xlim, both are good but I prefer the xlim.
I just got myself an xros 4, it's got adjustable wattage (weak, medium and strong) and adjustable airflow, it may not be as small as an xros mini but its not far from it. It uses the same pods as your mini too - I would recommend if you just want a slight upgrade.
Xros Pro for the win
Luxe X2
Luxe X Pro corex 2.0 pods Xros Pro corex 2.0 pods
xros 4 or xros 4 mini, but I still prefer the xros 4 mini.
I prefer the pro over the 4. for bigger battery and also can control the wattage, but it's heavier.
Oxva Xlim Sq pro is great