I smoked (and still smoke 4-5 a day) Virginia Slims 120 Menthol. I quite frankly like the long slim look aesthetically and think the Virginia Slims menthol flavors are really excellent.
In terms of the right look, nothing quite that slim works well, but I have found that the V4L manual XL batteries (380 mAH, last all day) come in a variety of colors to match my outfits and are long enough that with a cartomizer are 140mm long, so the length gives the slim illusion. V4L doesn't sell a PCC (Personal Charging Case) that works with the XL batteries though, so got one from CigEasy. Three batteries and the PCC (which also holds six cartomizers) allow me to always keep two topped up and one handy!
Their Virginia Menthol cartomizers (and the same e-liquid) are a pretty good imitation of the real deal, but that particular liquid requires cleaning cartos (if you want to do that) between refillings.
In terms of other e-liquids, SmokeAnywhereForPennys has a Gem Slims Menthol and a Gem Slims Ultra Light Menthol flavor that are also a good match and put less wear on the cartomizers.
Either way, the V4L XL kit, one extra XL battery, a couple boxes of Virginia Menthol cartomizers and an 808-d1 XL PCC from CigEasy will have you all set. I prefer manual batteries with the V4L system.
The 510 platform is also good, and their 280mAH battery is long enough to give a sleek appearance. I got mine in black and we all know that black is slimming. There are many vendors for this. I actually prefer the 510-T platform with the 280mAH auto battery; and I fill the little tanks with the Gem Slims Menthol juice. (I have found the V4L Virginia Menthol juice doesn't taste as good in tank type systems as it does in cartomizers for some reason.)
For this system I have the Mega PCC, three mega auto batteries, two atomizers and then the cartridges and e-liquid.
Both the 808d-1 V4L system and the 510 system are inexpensive, easily maintained, and look just plain fashionable.