BreezEsmokes is running a grand opening sale on the Riva's for $45 & they have a few others I'm not familiar with, but at very good prices.
As far as juice, I'm a Vapor Station fan. I've been using their juice almost exclusively for over a year. I'm not a menthol smoker, but their Seattle juice tastes just like a salem to me. They also have a great deal on a sample pack, 10 flavors,you pick for $25(50ml)
I also want to add, I spent the 1rst month I was vaping trying to duplicate the taste of an analog. I found I liked about everything but tobacco flavors, I mainly vape coffee flavors & am completely satisfied. I've also found I don't like ANYTHING from China,all have a chemical taste.
Since you like menthol, may I recommend DIY Flavorshack's Thin Mint, tastes just like a York peppermint patty. She also has a TON of other yummy flavors & she always sends extra goodies or samples.
The Cartos, I like the Boge over the SLB's.That being said, I've only used the SLB LR cartos & I just don't like the flavor, plus they seem to leak,but they do put out a ton of vapor. On the Boge carto's, I've only used the regular carto's & they work fine for me.
One other thing, most of us started out with regular 510 & the reason most of us switched to the Ego's was battery life. You stated that you only smoked 10 analogs a day. I on the other hand smoked 40 to 50 a day & the 510 served me well. Though I love the freedom of being able to leave the house without a half a dozen batteries & a PCC, I miss the comfortable feel of the 510. The Ego's are more like smoking a pipe to me. You just can't hold them like an analog.
I'm just saying, if you're a light smoker, a 510 may be perfect for you. I'm using a 306 right now at the computer because to me they deliver the best flavor(I use them for dipping)but if I leave the house, I grab my Ego with a carto.
That's my 2 cents, good luck to you & welcome to the forum.
Cheers,
NB