What is "RDA","RDTA " ?

RDA means: Rebuild-able Dripping Atomizer, there is no tank included to hold ejuice and feed the wick. You can get a perfect hit every time by dripping the ejuice directly to the wick manually, but you don’t need to always drip since there are some extra ejuice held .

RDTA means: Rebuild-able Dripping Tank Atomizer ,it’s RDA + RTA, with a tank to hold ejuice, and with a deck to build on, the difference is the function of “Auto Dripping”.

For the time being,there are so many types of RDA or RDTA tanks in the market and if you eed some recommendation, i will recommend GeekVape Avocado 24 RDTA or GeekVape Tsunami RDA for you, just as you knew,the GeekVape team is very famous for Atomizer and following are more details to account for why they worthy to buy

Avocado 24 RDTA, currently,it was regarded as the best RDTA tank in the market. Avocado 24mm is the big version of the original Geek Vape Acocado 22 ,features 5mL eJuice, single and dual coil supported,Velocity deck with Hinge lock fill system and 2 drip tip options and so on.See official features below

5ml Capacity
Eaty to build and fill
Velocity deck with Hinge lock fill system
Available for single and dual coil
2 drip tip options
big version of the original Geek Vape Acocado 22
perfect flavor experience
Peek Insulator Raw Material Made in U.S.A.
Hardness of 316SS Set Screws at 55-58HRC by 1200 Nitrogen Surface Treatment.
Silica Glass Tube: High Tempeture Resistant, Excellent Acid Resitant.
Drip tip height : 10mm ,Height : 33mm, Outside diameter : 24mm

While the Tsunami is another popular tank from geek vape, which features innovative two-post build deck, conceptualized airflow style, spacious build chamber, rectangular post terminals with high-quality set screws, three kinds of drip tip optional,PEEK insulator and so on .See features below

Adjustable Kennedy style airflow,available for single or dual coil
Three kinds of drip tip available
Uses long lifespan SS316 Set Screw
Insulator PEEK in top quality imported material
22mm Diameter
deep Juice Well
Superior Stainless Steel Construction
Side-Tension Vertical Two-Post Design
3mm by 2mm Retangular Terminal Post Openings
Single or Dual Configurations
Kennedy-Style Airflow
Dual Cyclops Bottom Airslots
Quad Airflow Tubes Inside Chamber
510 Drip Tip Adapter Included
WIde-Open Delrin Widebore Drip Tip
Diagonal Delrin Widebore Drip Tip
Stainless Steel Widebore Drip Tip
Adjustable Gold-Plated 510 Contact

So,it mainly depend on your own purpose and personally favorite.

Tesla Stealth 100W TC Mod is a tiny gadget directed toward beginners and experienced vapers. This ground breaking device comes with a 2200mAh internal LiPo battery
https://www.longhornvapor.com/product/tesla-stealth-mod/