Hi Dan
A PV is a Personal Vapouriser - in other words anything that will vapourise your juice for you.
As far as what to spend your hard earned cash on - I'm sure there will be as many different answers to this as there are forum members, but here's my contribution to get discussions underway!
First, the battery - go for an eGo batt, preferably a Joyetech (the original manufacturer). The eGo range of batteries all have a 510 fitting, which makes them compatible with a huge range of atomisers ('attys') and tank storage systems. The batteries come in various sizes and MaH (this is the capacity of the battery - the higher the number the more power it will store). The basic eGo will be 650maH, and they go up to I believe 1300maH. The higher numbers simply last longer between charges.
Have a look here to see what choices are available
www.vapeescape.co.uk/search.asp?types=Vaping+Spares+%3E+Batteries+%26+PassthroughsThere will be some discussion I'm sure on whether to go for an eGo 'Twist' or not. The Twist allows you to change the voltage of the battery by twisting the base plate. A higher voltage enables you to burn the atomiser at a higher temperature, giving more vapour and Throat Hit (TH).
Personally, I have resisted the temptation to go down the Twist route, sometimes called Variable Voltage (VV) so far, but may consider this in the future.
So that's the power side of things; next question, what do you use to store/burn the juice?
I use Clearomisers made by a company called Vision (beware - not all gear called Vision is actually made by the company, there are some copies being sold as such!). The Clearomiser (clearo) is essentially a tank which holds about 1.5ml of juice, and also has an atty head to vaoupise the juice. Some are life-limited (you chuck the whole thing away when the atty goes after a couple of weeks), some are rebuildable/replacable (the two words seem to be interchangeable!).
The replacable ones means that you only have to replace the atty head at a cost of £2.50, rather than the whole clearo at around £6. They are also easy to wash out and dry between different flavours of juice.
Another option is the Cartomiser (carto) which hold about 1ml of juice, and sit on the top of your battery. You may prefer to get something called a drip-tip to insert into the top of the carto to make it more comfortable.
See here for a range of cartos
www.vapeescape.co.uk/search.asp?types=Vaping+Spares+%3E+CartomisersThe stared ohm rating is around 2ohm (Standard Resistance = SR) - lowering the ohm rating will again give a hotter burn and more vapour and TH (the principle here is less resistance = more volts allowed to reach the atty, hence the increased burn).
Finally, there are carto tanks like the ViVi Nova and Mini Nova
www.vapeescape.co.uk/search.asp?types=Vaping+Spares+%3E+Tanks+%26+AccessoriesThese are juice storage systems with an atty inside to do the burning, which again can be replaced cheaply. The advantages here is the capacity of the tanks as well as the low cost of replacement parts.
All of the systems above will be a huge improvement on what you have already, and a quick internet search will give you various options for a starter kit which ticks all the boxes. Here are just a few to give you an idea of what's available:
Vision eGo starter kit - Liberty Flights
www.liberty-flights.co.uk/product.asp?id=180Enjuice 510 Carto kit -
www.liberty-flights.co.uk/product.asp?id=180Microcig starter kit with clearos - health-e-vape -
www.health-e-vape.co.uk/microcig-ego-ce4v3-titanium-coil-double-starter-kit-900-mah--2-battery-4023-p.aspCE5 Clearo kit - eXhale -
www.exhalecigarette.co.uk/product-p/ece5sk.htmUsually the higher the price, the more you get. Batteries are the most expensive component, and it's worth having at least 2 so one can be charging while the other is being used.
Consider also buying a spare charger, spare clearos and atty heads, and a good choice of juices.
Once you are all set up with gear, you should only be spending about £15/wk on juice with an atty head thrown in every second week. This is of course entirely dependent on your juice consumption.
I hope this helps you a bit, if you have any more queries, fire away! I'm sure there will be more advice on the way.
Right off for a kayak up the Fal river!!