The Volt system is designed to produce the best flavor and vapor experience and it does, usually, deliver. Like any cartomizer even Volt cartos will gunk up after a while and will need to be replaced with new ones. You can buy blanks and fill them yourself and save a few bucks since blanks are less expensive than pre-filled cartos. By the way, Volt cartos are considered among the best cartos available.
If you don't mind using a syringe to fill things, I used a syringe to fill cartos when I first started, the CE3 is a good choice. I am a big fan of them and just filled twenty-five of them in about fifteen minutes. Yeah, I've been doing it for a while, but it is easy to do and they last for quite a number of refills.
If you want to "move up", the Volt Spinner is variable voltage so you can "fine tune" it to your own preference. After that, X2 batteries with T3 or clearomizers is another good choice.
If you want to stay with the cig-a-like, the CE3 or the Nano are both good alternates to regular cartomizers. I have a small collection of VV and VV/VW devices, but I use my 78mm autos with CE3s most of the day. They are far too handy and convenient to be replaced by the big stuff when my hands are busy doing things, being productive (or what I like to think is productive LOL).
Just for the hell of it, I bought a blu disposable to judge a sub par product to a superior one, and I was surprised to barely get any flavor out of the menthol in a 2-4 second drag. That makes me wonder if I'm just doing it wrong. Do you guys just take a pull about as hard as a regular smoke and kinda put your tongue in the stream of vapor coming out? That's the only way I get any flavor out of it. The vapor burns a little too and seems to really dry out my throat as well...