Hmm... SO many options. I guess I would have to ask what you hope to achieve, and what your budget is? If you want something exquisite looking, small, durable and feminine, the XVO would be a nice choice. Temperature control has it's benefits for many. For single battery, compact, I really like the Evic VTC Mini best of all the small T.C. mods I have. If you want a true road warrior that you can run over several times with a large truck and it will continue working without fail, Provape probably holds the crown in that category. They just introduced a new 50w successor to their mighty P3 line. They are sleek, outrageously well built, and American made, but pricey.
Whole other genres are squonkers like the Reo line, which carry a juice bottle and are very effective with bottom fed rebuildable drip atomizers that support the bottom feed mode. I could go on for hours..
What aspect of your present gear do you want to find more satisfaction with?