Hello, and welcome. As far as the looks of various vaping equipment goes, I just do a google image search for it. I cannot give proper advice, but I may be able to help you a little with what I have experienced and learned reading the forum. I like cartos just fine, but on my ego battery the T2 looks nice and flush and serves me well. The wicks are near the top (leading to the coil) and not very long on a T2. This requires you to tip the unit back every few drags to keep the wicks wet. Those are the major drawbacks to a T2 compared to other top coil units with wicks that go all the way to the bottom and bottom coil units. However, T2s are very easy to clean and are not likely to ever leak like many bottom coil units are known to do. Unless I drop the whole unit on a hard floor, I expect my T2s will have a very long life. Having found 1.5, 1.8, 2.2 , and 2.5 ohm coil units (wicks included) for a buck a piece has allowed me to try a few different options cheaply. I can usually clean the coil/wick units quite a few times, too. 2.2 ohm on an standard ego is my favorite so far. However, it is a clearomiser, so I avoid strong citrus and other e-liquids than have been known to kill a clearomiser. Wicks style clearomisers and cartos (or carto-tanks) do not provide the same flavor or general vaping experience, you will have to try them yourself to decide. Many vapers have super strong preferences between the two. Some don't care for either carto filler material or the silica wicks found in almost every brand clearomiser, and go to great lengths to rebuild their own atty and use stainless steal mesh or twice boiled natural fibers for wicks. To each his own, probably TMI for you.
Regarding my personal view on trying new equipment: as long as I am spending the same or less per month that I was wasting on analogs, after finding the right equipment for me it will soon be only juice and coils/cartos to buy and the occasional battery replacement, which is much cheaper than a pack a day smoking analogs. I'm already out of the red and into the black, so I can easily justify regularly trying new e-liquid flavors, and maybe an expensive VV/VW in a few months. Best of luck finding something you really like before wasting too much money and time.