Trying to rationalize upgrading my vape rig

I want to buy a new vape.

Reasoning: My 30w iStick is dying in minutes running a sub-ohm tank at full power.
The little TOGO guy is a solid backup, but my 'main rig' sucks.
I want to try dripping, and I want my battery to last long enough that I don't
have to scavenge for outlets every time I go anywhere. These rigs should
accomplish that. Also the Picos are fucking tiny and rigged up with all kinds
of safety features like temperature monitoring and stuff that shuts it down
before it fucks up, and they come in hot pink, amongst other colours, so fuck yeah..

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Vapor North (Pickering)

$39.99 iStick Pico Mega 80W (and it can take a jumbo battery that lasts way longer, if I can find one)
https://www.vapornorth.com/products/istick-pico-mega-canada

$24.99 Tsunami RDA
https://www.vapornorth.com/products/tsunami-rda

(shipping $6, 10% off total with "reddit10")

+7.60 HST

$72.09

(PLUS an awesome battery bought at a local store, $17, but flexible)
https://www.thevaporbar.ca/collections/batteries/products/sony-vtc6-18650-3000mah-battery-30a

Sooo
$89
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Vape Loft (Toronto)

$44.99 iStick PICO 75W TC Express
https://www.vapeloft.com/istick-pico-mod-toronto

$39.99 Tsunami RDA
https://www.vapeloft.com/tsunami-rda-by-geek-vape-toronto

+$11 HST

$96

(PLUS an awesome battery bought at a local store, $17, but flexible)
https://www.thevaporbar.ca/collections/batteries/products/sony-vtc6-18650-3000mah-battery-30a

(I haven't looking into shipping from them - they don't currently have the RDA in stock either)

Sooo
$113
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Phatboy (some dude's bedroom)

$40? I'm guessing an iStick Power 80w - it's not listed on his
     website, and I didn't see a box label. Maybe a clone?
     He just said, "here, this is an iStick, it's 80w internal"
     Then he hummed and hawwed for a minute and said he could do
     $40 for it. I told him I'd think about it and got the fuck out.
     I used to be a salesman. I know what a pitch smells like.
https://www.canvape.com/ProductDetails.asp?ProductCode=IstickipowerA ($47 at that place, different store)

$34.99 Tsunami RDA
http://phatboyevapes.com/products/geekvape-tsunami-rda

+$10 HST

$85
(but only because he wants to sell me some sketchy old,
 possibly lightly used, internal-battery mod that doesn't
 require a high-end battery, otherwise I can't get a mod
 from him for less than $65 that will do the trick, and
 that would require a battery purchase as well)

                  - - - - - - - - -

Alternatively at Phatboy (going from listed products)

$64.99 Kanger KBox 70w (he hasn't got any mods cheaper than this other than a 40w listed)
http://phatboyevapes.com/products/kangertech-kbox-70w
or
$64.99 iStick Pico 75w Starter Kit (including a mediocre tank)
http://phatboyevapes.com/products/eleaf-istick-pico-75w-starter-kit

so that plus the RDA
+$13 HST

$113 still plus the battery though
$130 with the fancy battery
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These are the best prices I've found. I want to order from Vapor North
and then buy a battery somewhere in town.