Sure thing and sorry for using too much jargon on you.
Liberty flights sells the ego:
Electronic Cigarette - Starter Kits - Joye eGo
And the riva:
Electronic Cigarette - Starter Kits - Riva 510
The riva is a little higher in voltage than the ego so it could make the vapour a little warmer which is what you're after.
With the ego/riva I'm reccommending you use these...
Electronic Cigarette - Cartomizers - Boge Cartomizers and make sure you order a 510 one of those if get an ego or riva because it's a 510 connection too. You'll see they come in three types of resistance (from 3.0 to 2.0 ohms). The 2.0 ohm ones will be the hottest and 3.0 the coolest so you can see how hot you prefer these to be. The hotter they go the stronger the throat hit will be as a general rule.
If you go to the vendors list on ECF
Forum Suppliers they are all verified, trusted vendors you can use without worrying about them not being genuine. You don't have to use libertyflights, it's just so you can see the actual product and compare prices from there. If you do use libertyflights click the "discount codes" link at the top on the front page and it'll give you a code for 20% off your order.
For PG and VG, they're simply two different kinds of eliquid and the basics of these are: PG is more flavourful and gives you a better throat hit (TH) but less vapour and VG gives you more vapour but has less flavour and less throat hit. Most people use a mix of PG and VG in their juices because of that. Most seem to prefer 30% VG and 70% PG and some vendors offer ratios like this.
The higher the "mg" of nicotine is in the liquid the stronger it will feel on your throat. 18mg and over will be a strong throat hit for you. I find 24 too strong for me but it's a personal choice. Lower nicotine is softer on your throat.
I wouldn't rush to buy these, I'm sure others will reccommend other options too and could give valid reasons for it. Shop around for good prices on the ones I reccommended but don't consider it the only option. I don't have experience with higher voltage e-cigs called "mods" but others could give you advice on these. Because they're higher voltage, the vapour is hotter and you get a better throat hit because of that.
Hope that clears it up a bit for you!